Terms of Service

Expedite Systems, LLC (doing business as InStockNotify) , a Wisconsin Limited Liability Corporation (“InStockNotify”), provides white-label inventory stock notification platform for retail brands aimed at notifying consumers when a desired product is available for purchase (the “InStockNotify Platform”). The following terms and conditions govern all use of the InStockNotify services, which comprise the InStockNotify Platform, the InStockNotify website, and any software applications developed and offered by InStockNotify e.g., any implementation, integration, consulting, custom development, or similar services (“Professional Services”) (collectively referred to as the “Services”). By subscribing or using the Services, you (“you” or “Client”) agree to be bound by these Terms of Service and InStockNotify’s  Privacy Policy  (together, the “Agreement“). If you do not agree to this Agreement, then you may not access the InStockNotify website or use the Services.

Provision of the Services . InStockNotify shall make the Services available to Client pursuant to this Agreement and any applicable Subscription Order during the Subscription Term. If Client subscribes to use a specific App, such App will be available for Client’s use during the Subscription Term.

Grant of Limited License . InStockNotify hereby grants to Client a limited, non-exclusive, and non-transferable license to use the Platform Services and Apps under Client’s Marks during the Subscription Term solely for Client’s internal use and not, by implication or otherwise, to any parent, subsidiary or affiliate of Client. An individual or entity visiting the InStockNotify website who does not agree to a Subscription Order hereby receives a revocable, limited right to access the InStockNotify website solely as necessary to review InStockNotify’s publicly available materials about its products and services (terms herein which by their nature apply to Clients who agree to a Subscription Order (e.g., right to use the Apps) shall not apply to individuals or entities who do not agree to a Subscription Order). The licenses and rights granted herein do not transfer any ownership in the Platform Services, the Apps, the InStockNotify website or any part thereof. Except as expressly provided herein, this Agreement grants no express or implied license, right or other interest in or to any of InStockNotify’s intellectual property rights and InStockNotify reserves all rights, title and interest in and to the Services, including all intellectual property rights.

Trademarks . Client shall have exclusive ownership of, and all rights in and to, Client’s Marks, and any other Client Material provided to InStockNotify in connection with Client’s limited license to use the Platform Services and Apps under Client’s Marks. Notwithstanding the foregoing, Client hereby grants InStockNotify a worldwide, limited, perpetual, non-exclusive, non-transferable license to use Client’s Marks solely in connection with the provision of the Platform Services and the Apps. InStockNotify shall have exclusive ownership of, and all rights in and to, all InStockNotify Marks. Nothing herein shall be construed as granting to Client any rights in or to, or the right to use, the InStockNotify Marks. Any use of the InStockNotify Marks by Client requires the prior written consent of InStockNotify.

Restrictions . Except as expressly stated herein, Client may not: (a) modify, adapt, translate, copy or create derivative works based on the Services; (b) reverse engineer the Services or any part thereof; or (c) access the Services for the purpose of (i) developing a competitive product or service, or (ii) copying any ideas, features, functions or graphics of the Services.

Feedback and Feature Requests . InStockNotify shall retain all right, title and interest in the Service and the technology and software used to provide it, including any modifications or enhancements to the Service arising from Client feedback. InStockNotify also shall retain all right, title and interest in the Documentation. No rights are granted to Client by InStockNotify except as expressly stated in this Agreement.

Data and Confidentiality. All information and data, regardless of form, generated in the performance of or delivered under this Agreement or otherwise related to the Services as well as any information provided to InStockNotify shall be and remain the sole property of InStockNotify. Client shall keep all such information and data in confidence and not disclose or use it for any purpose other than in performing this Agreement except with InStockNotify's prior written approval.

• Confidential Information. During the term of this Agreement and for a period of three years after it expires or terminates, each party will maintain in strict confidence all technical and other data, purchase quantities, and terms covered in this Agreement and disclosed by the other party (“Confidential Information”) that (i) are marked "confidential", "restricted", or "proprietary", or (ii) due to its character and nature a reasonable person under like circumstances would treat as confidential. Neither party will use or reveal Confidential Information without the prior written authorization of the other party.
• Exceptions. This restriction will not apply to information (i) that is or becomes part of the public domain other than by means of a breach of this Agreement; (ii) that a party can prove by written documentation, was known to it before the disclosure by the other party; (iii) that a party subsequently rightfully receives from a third party not in violation of any trust or duty; or (iv) that was independently developed by the non-disclosing party.
• Each Party retains ownership of all their pre-existing intellectual property as well as intellectual property rights that were developed outside of this Agreement. Any custom development by InStockNotify and specifically listed as a deliverable under this Agreement or in Subscription Order under this Agreement, or developed in compliance with Client specifications or requests, shall be solely owned by, and title shall vest in or be assigned to InStockNotify.

Customer Data . Subject to the exceptions in the Privacy Policy, we will use Customer Data to provide the Services as permitted by this Agreement. Through provision of the Services, InStockNotify may collect Customer Data. As between Client and InStockNotify, Client exclusively owns all rights, title and interest in and to all Customer Data. Client, however, grants InStockNotify a royalty-free, perpetual, irrevocable, non-exclusive license to access and analyze Customer Data in order to provide or improve the provision of the Services, validate and compute fees for any Services, and to generate analytics on customer behavior. InStockNotify may use Customer Data internally to associate a Client Customer with their devices and share the associations and related data among the InStockNotify Services to enhance interoperability. Moreover, InStockNotify may aggregate Non-Personally Identifiable Information to use for any purpose, including selling the aggregated information to third parties. We will not share Non-Public Personal Information (information that identifies individual customers), except as allowed by the Privacy Policy and to provide improved identity capabilities for InStockNotify Clients that consume the InStockNotify Services.

Improvements . InStockNotify shall own all rights, title and interest, including but not limited to, all intellectual property rights, in and to all improvements to the Services and any new programs, upgrades, modifications or enhancements developed by InStockNotify in connection with providing the Services to Client, even where such refinements and improvements result from a request by or feedback from Client. To the extent, if any, that ownership in such refinements and improvements does not automatically vest in InStockNotify by virtue of this Agreement or otherwise, Client hereby assigns to InStockNotify all rights, title, and interest which Client may have in and to such refinements and improvements.

Modifications to Platform Services or Apps . Client acknowledges that InStockNotify may add, delete, change, suspend or terminate features, functionality or other aspects of the Services or the Apps at any time and for any reason, and that InStockNotify is under no obligation to upgrade or update the Platform Services or the Apps or ensure compatibility or continuity between any version of the Platform Services or the Apps and any prior or subsequent versions thereof; provided however that if InStockNotify makes a material change to the Platform Services or Apps, a Client who executed a Subscription Order may terminate the Subscription Order with written notice within seven (7) days of the date of such material change.

TERMS OF USE.

• Client’s Responsibilities. Client is solely responsible for: (a) the accuracy, quality, integrity, legality, reliability, and appropriateness of all Client Material provided by Client to InStockNotify or which Client integrates with or uses in connection with the Services; and (b) the creation, initiation and sending of emails utilizing the Services, including but not limited to, content (other than material provided by InStockNotify to Client), recipients, and timing of such emails. Client shall prevent unauthorized access to, or use of, the Services, and notify InStockNotify promptly of any unauthorized access or use. Client shall comply with all applicable local, state, federal and foreign laws in using the Services.

• Privacy. Client agrees:

  • to publish, maintain and abide by a privacy policy that: (i) is consistent with Client’s use of the information Client collects from individuals using the Services; (ii) allows InStockNotify to use Customer Data as outlined in this Agreement; (iii) complies with applicable law and applicable self-regulatory principles, if any; and (iv) prominently and adequately discloses Client’s collection, use, disclosure, storage, and aggregation of any information Client collects from individuals using the Services, including with respect to Non-Public Personal Information, collected via cookies, locally-stored objects or other tracking technologies;

  • that Client will not (and will not allow any third party to) use the Platform Services or the Apps to track or collect Non-Public Personal Information without properly informing (e.g., through a privacy policy) individuals of Client’s data collection, use, disclosure, storage, and aggregation practices (and only so long as such use conforms with any of Client’s other obligations under this Agreement);

  • that Client will not do any act to render any of the above obligations and notices untrue and will not include contradictory language in any privacy policy, that Client is responsible for ensuring that no other statement in Client’s privacy policy contradicts or nullifies any of the above statements, that Client will not rely on InStockNotify’s opinion or direction as a substitute for legal advice, and that Client will retain sole responsibility for ensuring that its conduct and policies (including Client’s privacy policy) are sufficiently protective of Client’s end users’ rights.

• User Guidelines. Client shall use the Services solely for its internal business purposes as contemplated by this Agreement and shall not: (a) license, sublicense, sell, resell, rent, lease, transfer, assign, distribute or otherwise commercially exploit or make the Platform Services available to any third party except as contemplated by this Agreement; (b) send via or in connection with the use of the Services infringing, obscene, threatening, defamatory, fraudulent, abusive, or otherwise unlawful or tortious material, including material that is harmful to children or violates third-party privacy rights; (c) send via or in connection with the use of the Services any unsolicited commercial or non-commercial communication; (d) send via, upload to, or store within the Services any viruses, worms, time bombs, Trojan horses and other harmful or malicious code, files, scripts, agents or programs; (e) interfere with or disrupt the integrity or performance of the Services or the information contained therein; or (f) attempt to gain unauthorized access to the Services or its related systems or networks.

FEES AND PAYMENT.

• Services Fees. All Services are available according to pricing published on the InStockNotify Site or as set forth in an applicable Subscription Order. Pricing is subject to change from time to time on a prospective basis at InStockNotify’s sole discretion; provided however that you may terminate a Subscription Order within fourteen (14) days of receiving a price adjustment notice, and your failure to terminate this Agreement on or before the expiration of such termination period shall constitute your acceptance of the new pricing terms. Client agrees to pay all fees due with respect to Client’s use of the Services. Fees are payable in U.S. dollars. Except as otherwise specified in an applicable Subscription Order, fees are based on the Services purchased and not actual usage.
  • Customer may upgrade Platform Services at any time, and will be billed at the upgraded price immediately.
  • Downgrading or decreasing Platform Services during the Subscription Term will not be refunded on a pro-rata basis. Fees will adjust to the downgraded Subscription pricing at the next billing term.

• Payment. Payment of all fees must be made in advance by a valid credit card accepted by InStockNotify. By approving a Subscription Order for the Platform Services, you authorize InStockNotify to charge your credit card monthly, in advance, for the fees set forth in the Subscription Order. If InStockNotify is for any reason unable to effect automatic payment via your credit card, you will be notified by email and access to the Platform Services will be disabled until payment is received. Late payments shall accrue interest of 1.5% per month, or the maximum rate allowable by law, whichever is less.
• Taxes. Unless otherwise stated, fees do not include any direct or indirect local, state, or federal taxes, levies, duties or similar governmental assessments of any nature, including value-added, use or withholding taxes (collectively, “Taxes”). Client is responsible for paying all Taxes associated with its purchases hereunder, excluding taxes based on InStockNotify’s net income or property. If InStockNotify has the legal obligation to collect or pay Taxes for which Client is responsible under this Agreement, the appropriate amount shall be paid by Client.

EU PERSONAL DATA TRANSFERS.

• InStockNotify processes Customer Data in the United States, and accordingly, Client represents and warrants that the transfer of Customer Data as contemplated by this Agreement complies with all applicable laws, including but not limited to the General Data Protection Regulation (“GDPR”) (EU) 2016/679. To the extent Client submits Customer Data which constitutes “personal data” of individuals subject to the privacy laws of the European Economic Area or Switzerland (collectively “EU Personal Data”), Client acknowledges that in all cases InStockNotify acts as the processor of EU Personal Data and Client remains the controller of EU Personal Data.
• This Agreement incorporates by reference the required contractual provisions from GDPR Article 28 between controllers (i.e. Client) and processors (i.e. InStockNotify).
• This Agreement incorporates by reference the Information Commissioner's Office's (ICO) International Data Transfer Addendum to the Standard Contractual Clauses set out in the Annex of Commission Implementing Decision (EU) 2021/914 of 4 June 2021.

REPRESENTATIONS, WARRANTIES AND DISCLAIMERS. Mutual Representations and Warranties. Each party represents and warrants that:

• it has the right and authority to enter into this Agreement;
• by entering into this Agreement it will not violate, conflict with or cause a material default under any other agreements;
• at all times during the term of this Agreement, it shall comply with all applicable laws, rules and regulations, including without limitation, Section 5 of the Federal Trade Commission Act and other statutes and regulations prohibiting unfair or deceptive marketing practices, the CAN-SPAM Act, and other consumer protection and privacy laws, regulations, and guidelines; and
• to its knowledge, no part of any materials provided by it to the other party infringes upon any third-party copyright, patent, trademark, trade secret or other proprietary or intellectual property rights.

CLIENT REPRESENTATIONS AND WARRANTIES. Client represents and warrants that:

• Client has exclusive ownership of, and all rights in and to, all Client’s Marks, and all other Client Material provided to InStockNotify or which Client integrates with or uses in connection with the Services or any InStockNotify Material;
• Client has the exclusive ownership of, and all rights in and to, or the right to license and provide the Client Material to InStockNotify, and that the use, copying, modification, aggregation, integration and publication of the Client Material by InStockNotify in connection with its provision of the Services: (i) will not infringe, violate or misappropriate any third-party copyright, patent, trade secret, or other proprietary rights; (ii) will not infringe any rights of publicity or privacy; (iii) will not be defamatory or obscene or otherwise violate any law;
• Client will enter into binding and enforceable agreements with each end user of the Platform Services and Apps provided under this Agreement and any applicable Subscription Order, that govern their use of the Platform Services and Apps, including terms of service and privacy policies that provide prominent and clear notices to and requires consents from end users with respect to the collection, use, storage, aggregation or other processing of Client’s Customer Data, including Non-Public Personal Information, and including any transfer of such Customer Data and Non-Public Personal Information to InStockNotify in connection with the provision of the Services; and
• Client will, at its own expense, comply with all applicable laws, rules and regulations, including without limitation all privacy and data protection laws, in connection with Client’s use of the Services and information derived therefrom (including but not limited to Customer Data) and the performance of Client’s obligations under this Agreement.

Disclaimer of Warranties. EXCEPT AS SPECIFICALLY SET FORTH IN THIS THE SERVICES AND INSTOCKNOTIFY MATERIAL PROVIDED BY INSTOCKNOTIFY IN CONNECTION WITH THIS AGREEMENT ARE PROVIDED SOLELY ON AN AS-IS BASIS, WITHOUT REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY ARISING OUT OF ANY COURSE OF DEALING, CUSTOM OR USAGE OF TRADE, WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INTERFERENCE AND NON-INFRINGEMENT. INSTOCKNOTIFY DOES NOT WARRANT THAT THE SERVICES WILL MEET CLIENT’S REQUIREMENTS OR ACHIEVE THE RESULTS DESIRED BY CLIENT OR THAT ANY CODE, FIXES, PATCHES, REVISIONS, UPDATES OR MODULES, IF ANY PROVIDED BY INSTOCKNOTIFY IN CONNECTION WITH THIS AGREEMENT OR THE SERVICES, WILL BE BUG-FREE OR ERROR-FREE OR THAT ANY CORRECTIONS OR FIXES WILL BE EFFECTIVE.

Indemnification by Client. Client agrees to defend, indemnify and hold InStockNotify and its officers, directors, employees, and agents (each a “InStockNotify Indemnitee”) harmless from and against any claims, demands, lawsuits, actions, proceedings or investigations made by any third party (“Claim”) from and against any fees, costs, sanctions, penalties, damages, losses or expenses (including reasonable attorneys’ fees) due to or arising out of: (a) Client’s use or misuse of the Services; (b) allegations that Client Material and/or any other information or material provided to InStockNotify by Client in connection with the provision of the Services, infringe the intellectual property rights or other rights of a third party; (c) InStockNotify’s use, in connection with its provision of the Services as provided herein, of any Customer Data provided by Client which has harmed a third party; (d) Client’s violations of applicable laws, rules or regulations in connection with its use of the Services, including without limitation, privacy laws; and (e) Client’s breach of the representations, warranties and covenants made by Client herein.

• Procedure. InStockNotify agrees to use reasonable efforts to promptly notify Client in writing of a Claim for which indemnification is sought and to provide Client with all non-monetary assistance, information and authority reasonably necessary for the defense and settlement of such Claim. InStockNotify reserves the right, at Client’s expense, to assume the exclusive defense and control of any Claim for which Client is required to indemnify any InStockNotify Indemnitee and Client agrees to cooperate with the InStockNotify Indemnitee in the defense of the Claim. Client shall obtain InStockNotify’s prior written consent to any settlement of a Claim, said consent not to be unreasonably withheld, conditioned or delayed.

LIMITATION OF LIABILITY AND EXCLUSION OF DAMAGES.

EXCEPT FOR A PARTY’S INDEMNIFICATION OBLIGATIONS, IN NO EVENT SHALL A PARTY’S (INCLUDING THE PARTY’S OFFICERS, DIRECTORS, EMPLOYEES AND AFFILIATES) AGGREGATE LIABILITY ARISING OUT OF OR RELATED TO THIS AGREEMENT, WHETHER IN CONTRACT, TORT OR UNDER ANY OTHER THEORY OF LIABILITY, EXCEED, IN THE AGGREGATE, THE TOTAL AMOUNTS ACTUALLY PAID BY CLIENT TO INSTOCKNOTIFY FOR THE SERVICES LESS ANY REFUNDS OR CREDITS RECEIVED BY CLIENT; HOWEVER, SUCH LIMITATION SHALL NOT RELIEVE CLIENT FROM HIS PAYMENT OBLIGATIONS FOR ANY OUTSTANDING AND DUE INVOICES FOR SERVICES RENDERED. IN NO EVENT SHALL A PARTY (INCLUDING THE PARTY’S OFFICERS, DIRECTORS, EMPLOYEES AND AFFILIATES) HAVE ANY LIABILITY TO THE OTHER PARTY FOR ANY LOST PROFITS OR FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY KIND OR NATURE HOWEVER CAUSED AND, WHETHER IN CONTRACT, TORT OR UNDER ANY OTHER THEORY OF LIABILITY, WHETHER OR NOT SUCH PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BOTH PARTIES UNDERSTAND AND AGREE THAT THE LIMITATIONS AND EXCLUSIONS SET FORTH HEREIN REPRESENT THE PARTIES’ AGREEMENT AS TO THE ALLOCATION OF RISK BETWEEN THE PARTIES IN CONNECTION WITH THEIR OBLIGATIONS UNDER THIS AGREEMENT. SOME JURISDICTIONS DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU, AND YOU MAY ALSO HAVE OTHER LEGAL RIGHTS THAT VARY FROM JURISDICTION TO JURISDICTION. NO CLAIM MAY BE BROUGHT BY CLIENT UNDER THIS AGREEMENT MORE THAN ONE YEAR AFTER THE ACCRUAL OF THE CLAIM.

TERM AND TERMINATION.

Agreement Term. This Agreement commences upon Client’s first access to or use of the Services and continues until terminated as set forth in this Section 9 (the “Term”).

• Subscription Term. A subscription to the Services commences on the date on which InStockNotify makes the InStockNotify Platform available to Client upon payment of the applicable monthly subscription fee. Unless otherwise set forth in a Subscription Order, subscriptions shall automatically renew for additional periods of one month for the fees set forth in the applicable Subscription Order unless either party gives the other notice of non-renewal at least ten (10) days prior to the end of the relevant Subscription Term. Closing your account on an e-commerce platform such as BigCommerce or Shopify does not constitute notice of cancellation and billing will continue until InStockNotify receives notice via one of the following methods:
• Uninstall the Platform Services,
• Close account functionality on the billing page within the Platform,
• Email support@instocknotify.com of your intent to cancel.
• Termination for Convenience. Either party may terminate this Agreement without cause upon fourteen (14) days written notice to the other party.
• Termination for Cause. A party may terminate this Agreement: (a) upon seven (7) days written notice of a material breach to the other party if such breach remains uncured at the expiration of such period; or (b) immediately if the other party becomes the subject of a petition in bankruptcy or any other proceeding relating to insolvency, receivership, liquidation or assignment for the benefit of creditors. Upon any termination for cause by InStockNotify, Client shall remain obligated to pay all fees owed, which fees shall become immediately due and payable in full.
• Effect of Termination. Upon termination or expiration of this Agreement all licenses granted herein shall be immediately revoked and terminated. Client has 90 days from the date of termination to download their data from the Service, after which time all data will be permanently deleted. The rights and obligations of the parties set forth in the Data and Confidentiality and Representations, Warranties and Disclaimers, and Feedback and Feature Requests Sections shall survive termination or expiration of the Agreement, and you shall immediately remit all outstanding amounts due under this Agreement which accrued prior to the termination of this Agreement. THE TERMINATION PROVISIONS IN THIS SECTION STATE CLIENT’S SOLE RIGHTS AND EXCLUSIVE REMEDY FOR INSTOCKNOTIFY’S FAILURE TO DEVELOP, OPERATE, OR PROVIDE THE PLATFORM SERVICES.
• Relationship of the Parties. Nothing in this Agreement shall be construed to create a partnership, joint venture, affiliate, employer-employee or principal-agent relationship, but rather the relationship of the parties shall be that of independent parties.
• No Third-Party Beneficiaries. The parties agree that there are no third-party beneficiaries to this Agreement.
• Waiver and Cumulative Remedies. The failure to enforce any provisions of this Agreement shall in no way be construed as a waiver of such provisions and shall not affect a party’s enforcement rights thereafter. Other than as expressly stated herein, the remedies provided herein are in addition to, and not exclusive of, any other remedies of a party at law or in equity.
• Force Majeure. Neither party shall be deemed in default of this Agreement to the extent that performance of its obligations or attempts to cure any breach are delayed or prevented by reason of any act of God, fire, natural disaster, accident, riots, acts of government, shortage of materials or supplies, epidemics, pandemics, or any other cause beyond the reasonable control of such party.
• Attorneys’ Fees. If either party hereto resorts to legal action for the redress of a breach of this Agreement, the prevailing party shall be entitled to an award of costs and reasonable attorneys’ fees.
• Changes to Agreement. InStockNotify may modify the terms of this Agreement and may discontinue or change any aspects of the Services at its sole discretion (on a prospective basis); provided, however, that InStockNotify provides adequate written or electronic notice to you of any material changes (the posting of the Agreement on the InStockNotify Site shall constitute effective electronic notice). If Client executed a Subscription Order and does not agree to such changes, Client may terminate the Subscription Order with written notice within seven (7) days of such changes. You should review the InStockNotify Site regularly. Changes will not apply retroactively and will become effective upon those changes being made live.
• Assignment. This Agreement shall be binding upon and inure to the benefit of the parties and their successors and assigns; provided, however, that this Agreement shall not be assigned by Client without InStockNotify’s prior written consent. InStockNotify may assign this Agreement in connection with a change of control, reorganization, or sale of at least a majority of its assets or outstanding voting securities.
• Severability. If any provision of this Agreement shall be held invalid or unenforceable, the remaining provisions shall not be affected thereby.
• Governing Law. This Agreement shall be governed by the laws of the State of Wisconsin, without regard to its choice-of-law principles. Any dispute arising out of or related to this Agreement or the Services shall be subject to the exclusive jurisdiction and venue of the Wisconsin state courts, and the parties hereby agree to the personal and exclusive jurisdiction and venue of these courts.
• Notices. All notices under this Agreement shall be in writing and shall be deemed to have been given upon: (a) personal delivery; (b) the second business day after mailing; (c) the second business day after sending by confirmed facsimile; or (d) the second business day after sending by email. Except as otherwise agreed, all notices required or permitted to be provided to Client hereunder shall be sent to the email address provided by Client to InStockNotify in connection with the Subscription Order or through the InStockNotify Site. Except as otherwise agreed, all notices required or permitted to be provided to InStockNotify shall be sent to the following email address: support@instocknotify.com.
• Entire Agreement. This Agreement constitutes the entire agreement between the parties and supersedes all prior and contemporaneous agreements, whether written or oral, concerning its subject matter. No modification, amendment, or waiver of any provision of this Agreement shall be effective unless in writing and signed by the party against whom the modification, amendment or waiver is to be asserted.