Acknowledgement Sample Forms: I. Form for Ordinary Certificate of Acknowledgment. A description of the gift and the amount received; Any goods or services your organization provided in exchange for the donation.A sample acknowledgement letter helps acknowledge payments received from clients as advance payments, membership, loans, or school fees. Thank you for your contribution of . Thank you for your prompt payment. What should be included in a gift acknowledgment letter? An acknowledgement agreement is a legal document formalizing some agreement between parties, similar to a memorandum of understanding. A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution. This form is used to set up direct deposit for child support payments. Sample fund-raising letters for raising money to go on short-term missions trips.