Subject: Objection to Invoice [#] — Exceeds Fixed Price Dear [Contractor Name], We received Invoice [#] dated [Date] in the amount of $[Amount]. This invoice exceeds the fixed price agreed in our Agreement dated [Date]. CONTRACTUAL PRICE: Per Section [X], the total contract price is $[Fixed Price] for completion of [scope of work]. This is a fixed price contract, meaning you bear the risk of cost increases. INVOICE AMOUNT: Your invoice totals $[Amount], exceeding the contract price by $[Overrun]. OBJECTION: We object to the overrun and will pay only $[Fixed Price]. You have not provided: 1. A signed change order authorizing additional work or cost. 2. Evidence of truly unforeseen conditions justifying a price adjustment. If you believe you are entitled to additional payment, please provide: - Documentation of any change orders we approved. - Detailed explanation of unforeseen conditions (with contemporaneous notice). Absent such documentation, we will remit $[Fixed Price] in full satisfaction of the contract. Please confirm receipt and your response within [7] days. Best regards, [Your Name]

Subject: Objection to Invoice [#] — Exceeds NTE Cap Dear [Contractor Name], We received Invoice [#] for $[Amount], which exceeds the Not to Exceed (NTE) cap established in our Agreement. NTE CAP: Per Section [X], "Total cost shall not exceed $[NTE] without prior written approval from Client." INVOICE: Your invoice totals $[Amount], exceeding the NTE cap by $[Overrun]. NO APPROVAL: We did not provide written approval to exceed the NTE cap. We have no record of any request from you for such approval. OBJECTION: We will pay only up to the NTE cap of $[NTE]. The excess amount of $[Overrun] is not authorized and will not be paid. If you contend that we approved the overrun, please provide: - Written documentation of our approval (email, signed change order, etc.). We expect a revised invoice reflecting the NTE cap within [7] days. Sincerely, [Your Name]

Subject: Request for Detailed Cost Breakdown — Invoice [#] Dear [Contractor Name], We received Invoice [#] for $[Amount], which significantly exceeds the original estimate of $[Estimate]. Before processing payment, we require a detailed breakdown of all costs. INFORMATION REQUESTED: 1. Labor: Hours worked by each person, with timesheets and hourly rates. 2. Materials: Itemized list of materials purchased, with receipts/invoices. 3. Subcontractors: Invoices from all subcontractors, with scope of their work. 4. Other Costs: Explanation and documentation for any other charges (travel, equipment rental, etc.). COMPARISON TO ESTIMATE: Please provide a side-by-side comparison: - Original estimate: $[Estimate] - Actual costs: $[Amount] - Variance: $[Overrun] - Explanation of each variance item We also request: - Any change orders or scope changes that contributed to the overrun. - Explanation of why costs exceeded the estimate. Please provide this information within [10] business days. We will review and respond accordingly. Thank you, [Your Name]

Subject: Objection to Specific Charges in Invoice [#] Dear [Contractor Name], We have reviewed Invoice [#] and object to the following line items: DISPUTED CHARGES: 1. [Item, e.g., "Rework of Module A"]: $[Amount] Reason: This rework was necessitated by your error in the initial implementation. We should not bear the cost of correcting your mistakes. 2. [Item, e.g., "Consultant X fees"]: $[Amount] Reason: We did not approve the engagement of Consultant X. Per Section [Y], all subcontractors require our prior written approval. 3. [Item, e.g., "Premium shipping"]: $[Amount] Reason: Premium shipping was required only because you missed the deadline. This is a cost of your delay, not a reimbursable project cost. 4. [Item, e.g., "Travel to [Location]"]: $[Amount] Reason: This travel was not related to our project (see your social media posts from that date). TOTAL DISPUTED: $[Total Disputed] We will pay the undisputed amount of $[Invoice Amount - Disputed] within [X] days. The disputed amount will be withheld pending resolution. Please provide documentation justifying each disputed item within [7] days. Best regards, [Your Name]

FORMAL OBJECTION TO COST OVERRUN AND DEMAND FOR REFUND [Date] [Contractor Name] [Address] Re: Objection to Invoice [#] — Unauthorized Cost Overrun Dear [Contractor Name]: This letter constitutes our formal objection to Invoice [#] and demand for refund of amounts paid in excess of the contract price. FACTS: 1. On [Date], we entered into a [fixed price/T&M with NTE cap] Agreement for [scope of work]. 2. The agreed price was $[Price] [or NTE cap of $[NTE]]. 3. You have billed a total of $[Amount], exceeding the contract by $[Overrun]. 4. We have paid $[Amount Paid], which exceeds the contract price by $[Overpayment]. CONTRACTUAL TERMS: Section [X] provides: "[Quote relevant provision, e.g., 'Total contract price is $X, fixed and not subject to adjustment']." Section [Y] provides: "[E.g., 'Any changes to scope or price require a written change order signed by both parties']." NO AUTHORIZATION: We did not authorize the overrun. Specifically: - No written change order was signed. - No approval was given to exceed the [fixed price/NTE cap]. - You did not provide notice when costs approached the limit (as required by Section [Z]). BREACH OF CONTRACT: By billing in excess of the contract price without authorization, you have breached the Agreement. DEMAND: 1. Immediate refund of $[Overpayment] (amounts paid in excess of contract price). 2. Revised final invoice reflecting the correct contract price of $[Price]. 3. Confirmation that no further amounts are due. If we do not receive the refund and revised invoice within [14] days, we will: - Pursue all available remedies, including arbitration/litigation. - Seek recovery of attorneys' fees and costs per Section [Attorneys' Fees Clause]. - Assert counterclaims for damages resulting from the overrun (project delays, etc.). Please respond by [Date]. Sincerely, [Your Name] [Title]

NOTICE OF INTENT TO WITHHOLD PAYMENT [Date] [Contractor Name] [Address] Re: Notice of Withholding — Invoice [#] Dear [Contractor Name]: This letter serves as notice that we are withholding payment of $[Amount] from Invoice [#] due to disputed cost overruns. AMOUNT WITHHELD: $[Amount] REASON FOR WITHHOLDING: The invoice includes charges that exceed the contract price and/or are not supported by the Agreement: 1. [Specific charge]: $[Amount] — [Reason for dispute] 2. [Specific charge]: $[Amount] — [Reason for dispute] [etc.] UNDISPUTED AMOUNT: We will pay the undisputed amount of $[Undisputed Amount] within [X] days, representing: - [Description of undisputed charges] RESOLUTION: To resolve the dispute, we propose: 1. You provide documentation justifying the disputed charges (change orders, prior approvals, etc.). 2. We meet to discuss the overrun and reach a compromise. 3. If no resolution, we proceed to mediation per Section [Dispute Resolution Clause]. We reserve all rights under the Agreement, including the right to offset overpayments against future invoices or pursue recovery. Please contact me within [7] days to discuss. Best regards, [Your Name]