3 day cooling off rule
Under the Federal Trade Commission's "Cooling Off" Rule, you have three business days to cancel any purchase of $25.00 or more that you have made in your home or somewhere other than the seller's usual place of business, such as a rented hotel room. If you decide to cancel the sale, sign and date the cancellation form. Mail or deliver a copy to the address given for cancellation anytime before midnight of the third business day after the date of the contract (it must be postmarked before midnight of the 3rd business day). Also, keep a copy for your personal records. Since proof of the date you mailed the cancellation form to the company is important, send it from the post office via certified mail with a return receipt requested. You do not need to give a reason for the cancellation.The day that you made the purchase (signed the contract) is day one. Almost all companies consider Saturday a business day and many consider Sunday a Business day, please clarify this with your salesperson before signing the contract.
If you fail to cancel prior to midnight of the third business day, the business may hold you to that contract. However, after the 3-day right to rescind has expired some companies will allow you to cancel but charge you a substantial cancellation fee. This would be at the company's discretion.