CH14810. Donation Form. To mail in your check donation please complete the following information.The online donation form must be filled out completely in order for your request to be considered. Tips for Writing a Church Donation Fundraising Request Letter. Use the Recipient's First Name. Gather all information required to complete the form. Have a valid form of payment. If you or your company would like to donate to this auction, please fill out and return this form. 1. Print the template on letterhead. Gather all information required to complete the form.