The IRS requires written acknowledgement from the qualified organization (charity) for all item or property donations over $500. You must keep this statement with your personal records in case the IRS requires you to provide it.
The statement must include a description of the item(s) or property donated and the date the donation was made. If you received any goods or services in return for making the donation (other than token items or membership benefits), the statement must include the monetary value of these goods and services.
Note: Even if you received an intangible benefit for making the donation (for example, spiritual satisfaction), the statement must say so.
The written acknowledgement must be dated on or before the deadline for filing your return (extensions included) for the year you made the donation.