TREC's Amendment form is renumbering: the version effective 07/01/2026 is TREC No. 39-11, replacing TREC No. 39-10 (the printed form text carries a revision date of 05-04-2026). It's used to modify a contract after it has already been signed by the parties — the form frames it as: "Seller and Buyer amend the contract as follows," with ten checkboxes covering the full range of changes TREC's form allows.
The ten things you can check
- Sales price. Broken into cash portion payable at closing, the sum of financing described in the contract, and the total sales price (the sum of both).
- Additional repairs and treatments the seller will complete at seller's expense, beyond what the contract already requires. The form notes Paragraph 7 of the contract governs completion, documentation, and transfer of warranties for repairs and treatments.
- Closing date — the date in Paragraph 9 of the contract.
- The amount in Paragraph 12A(1)(b) of the contract.
- The amounts in Paragraph 12B — how much seller and/or buyer will pay, each as either a flat dollar amount or a percentage of the sales price.
- Cost of lender-required repairs and treatment, itemized on an attached list, split by dollar amount between seller and buyer.
- An additional option fee the buyer pays the seller to extend the unrestricted right to terminate the contract, through a specific date and time (the form specifies 5:00 p.m.) — with a checkbox for whether this additional fee will or will not be credited to the sales price.
- Buyer waives the unrestricted right to terminate the contract for which the option fee was originally paid.
- The date for buyer to give written notice that Buyer cannot obtain Buyer Approval, as set forth in the Third Party Financing Addendum, changed to a new date.
- Other modifications — with the form's own caution printed directly beside the checkbox: "Real estate brokers and sales agents are prohibited from practicing law."
Consult an attorney before signing. The form repeats this warning in bold directly above the signature block: "TREC rules prohibit real estate brokers and sales agents from giving legal advice. READ THIS FORM CAREFULLY."
Execution line
The form closes with: "EXECUTED the ____ day of ____________, 20____. (BROKER: FILL IN THE DATE OF FINAL ACCEPTANCE.)" — a date distinct from the original contract's Effective Date, and one the form explicitly assigns to the broker to complete.