Some real estate contracts spell out the manner in which they can be canceled. They might say: “On or before thirty days from the Effective Date of this contract, Buyer may cancel for any reason by giving Notice to Seller.” That seems straightforward, until you wonder, “What is the Effective Date?” Is it a certain date, or is it the date the last person signed the contract? What was that date? Is there any particular way I have to give notice? One clue is that the word “Notice” is capitalized. That means some other part of the contract defines the word notice. Usually, some clause near the end will say that notice is effective if, for example, it is mailed to the recipient by United States Postal Service certified mail, return receipt requested. You have to follow the requirements exactly in that case. You cannot send the notice by Federal Express, for example, just because you believe the seller will receive it more quickly that way.