Most states now regulate timesharing, either under existing state land sale laws or under laws that were specifically enacted for timesharing. The regulating authority is usually the real estate commission in the state where the timeshare property is located. Under the typical act, purchasers may cancel the timeshare contract within a certain number of calendar days after the date the contract is signed if the seller is notified of the cancellation in writing.
The following is a generic form of such a letter.