A Federal Trade Commission rule on door-to-door sales of $25 or more gives consumers the right to cancel a transaction up until midnight of the third business day after the date of the sale. The rule applies to any sales agreements made away from the seller's normal place of business, such as sales parties held in private homes or sales made out of restaurants or rented hotel rooms. The rule does not apply to sales made totally by telephone or by mail; to real estate, insurance or securities sales; or to emergency home repairs.
The seller must tell consumers of their right to cancel, give them a contract or receipt and give them two copies of the notice of cancellation. The contract should be dated and it should clearly show the seller's name and address. If the consumer cancels, the seller must refund your money within ten days and return to you any documents you have signed.
Some states or local jurisdictions have additional laws applicable to door-to-door sellers, such as registration requirements.
FTC: "Door-to-Door Sales"