Subject: Notice of Defect — Order [Number], Invoice [#] Dear [Supplier Name], I am writing to notify you of a defect in the goods delivered under Order [Number], Invoice [#], dated [Date]. DESCRIPTION OF DEFECT: [E.g., "The electronic components exhibit intermittent failure under normal operating conditions. Specifically, units #12, #15, and #23 shut down after 2-3 hours of operation, contrary to the specification of continuous 24/7 operation."] DISCOVERY: The defect was discovered on [Date], during [routine inspection/installation/testing]. Attached are: - Photographs of the defective units (Attachment A) - Test results showing failure (Attachment B) - Inspection report by [independent expert/our technician] (Attachment C) CONTRACTUAL BASIS: Per Section [X] of our Agreement, you warrant that goods will [conform to specifications/be free from defects/be fit for ordinary use]. The delivered goods do not meet this standard. REQUEST: We request that you: 1. Acknowledge this notice within [5] business days. 2. Inspect the goods (we can arrange access or return shipment at your expense). 3. Provide replacement goods or repair the defective units within [14] days. We reserve all rights under the Agreement and applicable law (CISG/UCC), including the right to claim damages. Please contact me promptly to arrange remedy. Sincerely, [Your Name] [Title]

Subject: SECOND NOTICE — Defect in Order [Number] Dear [Supplier Name], This is a follow-up to my notice dated [Date] regarding defects in Order [Number]. As of today, [X] days have passed without response from you. The defective goods remain unusable, causing [delays in our production/additional costs/lost sales]. We reiterate our request: - Acknowledge the defect and provide a remedy plan within [7] days. - Replace or repair the defective units at your expense. - Compensate us for damages incurred (details below). DAMAGES TO DATE: - Cost of temporary replacement: $[Amount] - Production downtime: $[Amount] - [Other damages]: $[Amount] TOTAL: $[Total] If we do not receive a satisfactory response by [Date], we will proceed with: 1. Repair at our expense and charge you for the cost. 2. A formal demand for full refund and damages. 3. Arbitration/litigation as provided in the Agreement. Please treat this matter urgently. Best regards, [Your Name]

FORMAL WARRANTY CLAIM AND DEMAND FOR DAMAGES [Date] [Supplier Name] [Address] Re: Warranty Claim — Order [Number], Defective Goods Dear [Supplier Name]: I write on behalf of [Your Company] to assert a warranty claim and demand damages arising from defective goods delivered under our Agreement dated [Date]. FACTS: 1. On [Delivery Date], we received [description of goods] (Order [Number], Invoice [#]). 2. The goods were defective: [describe defect]. 3. We provided notice of the defect on [Date] (copy attached). 4. You have failed to remedy the defect or respond to our notices. CONTRACTUAL WARRANTIES: Per Section [X] of the Agreement, you warranted that goods would: - [E.g., "Conform to the technical specifications (Exhibit A)"] - [E.g., "Be free from defects in materials and workmanship"] - [E.g., "Be fit for ordinary use in commercial applications"] The goods manifestly fail to meet these warranties. LEGAL BASIS: Under CISG Article 35 [or UCC §2-314/§2-315], you are liable for delivery of non-conforming goods. We are entitled to: - Replacement goods (CISG Art. 46, UCC §2-608) - Refund of purchase price (CISG Art. 81, UCC §2-711) - Damages (CISG Art. 74, UCC §2-715) AMOUNT CLAIMED: - Purchase price (refund): $[Amount] - Cost of temporary replacement: $[Amount] - Repair costs: $[Amount] - Consequential damages (production downtime): $[Amount] - Incidental damages (inspection, storage): $[Amount] - Attorneys' fees (per Section [Y]): $[Amount] TOTAL: $[Total] DEMAND: We demand payment of $[Total] within [14] days. Alternatively, we will accept: - Immediate replacement with conforming goods, plus compensation for damages incurred to date. If payment or replacement is not received by [Date], we will pursue all available remedies, including arbitration/litigation. Please confirm your response by [Date]. Sincerely, [Your Name] [Title]

Subject: Claim for Consequential Damages — Defective Goods Dear [Supplier Name], In addition to our warranty claim for replacement/refund, we claim consequential damages resulting from the defective goods delivered under Order [Number]. DAMAGES INCURRED: 1. Production Downtime: Our production line was halted for [X] days while we sourced replacement components. - Lost production: [X] units × $[Unit Price] = $[Amount] - Overhead costs during downtime: $[Amount] 2. Customer Penalties: We incurred penalties from our customer [Client Name] due to delayed delivery caused by the defect. - Penalty per contract: $[Amount] (copy of client contract attached) 3. Emergency Procurement: We were forced to purchase replacement goods on an expedited basis at a premium price. - Premium paid: $[Amount] (invoices attached) 4. Repair of Customer Equipment: The defective components damaged our customer's equipment, which we had to repair. - Repair cost: $[Amount] (invoices attached) TOTAL CONSEQUENTIAL DAMAGES: $[Total] LEGAL BASIS: Under CISG Article 74, you are liable for damages that were foreseeable at the time of contract formation. You knew that: - We use your components in a production line operating 24/7. - Defects would cause production delays and penalties from our customers. Under UCC §2-715, we are entitled to consequential damages including lost profits and penalties. We demand payment of $[Total] within [14] days. Sincerely, [Your Name]

Subject: Response to Repair Offer — Demand for Replacement Dear [Supplier Name], Thank you for your offer to repair the defective goods. However, we must decline and insist on replacement or refund. REASONS: 1. The defect is fundamental and affects the core functionality of the goods. 2. Repair would take [X] weeks, causing unacceptable delays in our operations. 3. We have lost confidence in the reliability of these goods; even after repair, we cannot trust them for critical applications. 4. Per Section [X] of the Agreement, we are entitled to replacement for defects discovered within [warranty period]. LEGAL BASIS: Under CISG Article 46(2), we have the right to require replacement if the defect constitutes a fundamental breach. Under UCC §2-608, we may revoke acceptance and demand a refund if the goods substantially impair their value to us. We reiterate our demand: - Immediate replacement with conforming goods, shipped at your expense. - OR full refund of $[Purchase Price], plus damages of $[Amount]. If you cannot provide replacement within [7] days, we will treat this as a refusal and proceed with a claim for refund and damages. Please confirm your decision by [Date]. Best regards, [Your Name]