If you plan on giving to charity before the end of the year, remember that a cash contribution must be documented to be deductible. If you claim a charitable deduction of more than $500 in donated property, you must attach Form 8283. If you are claiming a deduction of $250 or more for a car donation, you will need a contemporaneous written acknowledgement from the charity that includes a description of the car. Remember, you cannot deduct donations to individuals, social clubs, political groups or foreign organizations.