Demand Letter Drafter

[Firm Letterhead] March 23, 2026 Via Certified Mail and Email [Opposing Party Counsel] [Address] Re: Demand for Return of Proprietary AI Training Data and Cessation of Unauthorized Use — Joint Venture Dissolution Dear Counsel: We represent DataVantage Analytics, Inc. ("DataVantage"), a California-based artificial intelligence company. We write regarding your client's unauthorized retention and use of proprietary AI training datasets following the termination of the parties' joint venture. BACKGROUND: DataVantage and your client entered into a Joint Venture Agreement and accompanying Mutual Non-Disclosure Agreement in March 2024 for the purpose of developing a joint AI-powered data analytics platform. The joint venture was dissolved by mutual agreement effective January 31, 2026. Under the terms of the Joint Venture Agreement, each party was required to return or certify destruction of all proprietary materials provided by the other party within 30 days of dissolution. YOUR CLIENT'S BREACH: Despite the 30-day deadline having passed, DataVantage has received no certification of destruction from your client, and our client has credible evidence that your client continues to use DataVantage's proprietary training datasets in your client's standalone product development. Specifically, outputs from your client's recently launched analytics module show structural patterns that are characteristic of training on DataVantage's curated financial services dataset — which was shared exclusively under the NDA for joint venture development purposes only. DEMANDS: DataVantage hereby demands that your client, within 10 business days: 1. Immediately cease all use of DataVantage's proprietary training data in any product, feature, or service; 2. Return all copies of DataVantage's proprietary materials, including all derivative works; 3. Provide a written certification, executed by an authorized officer, confirming complete cessation of use and return or destruction of all materials; 4. Preserve all documents related to this matter pending further proceedings. Failure to comply will leave DataVantage no alternative but to pursue all available remedies, including injunctive relief and claims for damages. We trust your client will take immediate action to comply with its contractual obligations. Please confirm receipt and your client's intended response within 5 business days. Sincerely, [Attorney Name] [Firm Name] Note: This demand letter is a template for attorney review and adaptation. It does not constitute legal advice and should be reviewed by licensed counsel before transmission.