Pennsylvania recognizes two formal substitutes for consideration to include in a donation agreement: Add the word "Seal" next to the signature lines. In this post, I'm breaking down how to write a donation letter.1. Print the template on letterhead. Download Pennsylvania 501(c)(3) Donation Receipt template, modify and send for signing using BoloForms Signature. Pennsylvania Health Law Project. This document provides a sample format for a letter acknowledging an in-kind contribution or donation. Download Pennsylvania 501(c)(3) Donation Receipt template, modify and send for signing using BoloForms Signature. This is a vehicle donation form that includes all necessary details for properly completing the donation of a vehicle. Copy of the donor's out-of-state registration card (provided they are reciprocal with Pennsylvania). In the nonprofit world, writing thank-you notes is incredibly important for donor stewardship.