View the list of Sample Business Letters Acknowledgement of Modified Terms Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Acknowledgement of Modified Terms ACKNOWLEDGEMENT OF MODIFIED TERMS Date: _ To: _ Reference is made to the contract or order between us dated _, 19_. This letter will acknowledge that the contract is modified and superseded by the following change in terms: (Describe changed terms) _ Unless we immediately hear from you to the contrary, we shall assume said modification is mutually agreeable. Very truly, _______________________________