you can read this link fron the iRS. ignore the dates. the rules still apply
https://www.irs.gov/newsroom/qualified-charitable-distributions-allow-eligible-ira-owners-up-to-1000...
in short
1) Personal letter instructing your financial institution to make a direct transfer to the charity.
2) Amount of the donation, date of the donation, name of the charity, and whether the charity provided any goods or services.
