The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes. What do you need to include in your donation acknowledgment letter?Thank you for your prompt payment. A form for the employee to sign acknowledging receipt of the policies. Following are samples of these provisions. Check out our letter of acknowledgement template selection for the very best in unique or custom, handmade pieces from our templates shops. If you want to have a guide or basis in writing your letter of acknowledgment, then you may refer to the sample letter templates here in our site. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations.