A sample acknowledgement letter helps acknowledge payments received from clients as advance payments, membership, loans, or school fees. A description of the gift and the amount received; Any goods or services your organization provided in exchange for the donation.3416 Goni Road, Building D-132 ○ Carson City, Nevada 89706. Nevada Notary Acknowledgement (individual) ✓ easily fill out and sign forms ✓ download blank or editable online. Sign the IOU letter at the bottom. Your signature signifies your acknowledgment of the debt and your commitment to repaying it.