In general, a well put together donation receipt should include the nonprofit organization's basic information such as name, the donation date, the donation amount, and a statement indicating that the organization is indeed an official nonprofit with their corresponding nonprofit ID nonprofit listed.
Ing to the IRS, any kind of donation above $250 should require a donation receipt. The same applies to stock gifts/donations.
Proof can be provided in the form of an official receipt or invoice from the receiving qualified charitable organization, but it can also be provided via credit card statements or other financial records detailing the donation.
The name of the nonprofit or charity (plus the gift officer's name and title, if applicable) The date that the donation was made. The donation amount. A signature from the nonprofit or charity that verifies the invoice.