Debt collection laws stipulate specific wording that must be present in order for a cease and desist letter to be valid. Here is an example of a valid cease and desist letter from the Family Credit Management Services website:
Your NameYour AddressCity, State ZIP
(Sent via Certified Mail with Return Receipt)
Date:
Re: Account #
Collection AgencyAddressCity, State, ZIP
Pursuant to the Fair Debt Collection Practices Act, 15 U.S.C. section 805., you are hereby notified to cease and desist all further communication with me in regard to the referenced debt.
Failure to abide by this law will result in a complaint being filed against you with the Federal Trade Commission, the Attorney General of both your state and mine, and also your company management. I also reserve the right to file suit against you for any future violations of this law. I will record any phone calls if you fail to comply with this cease and desist.
Sincerely,
Your Name
Please make sure that you send this letter certified with a return receipt. Debt collection laws place the burden of proof on you, so if a collection agency claims you never sent a cease and desist letter you will need to prove that you did and that they received it. The only way to do so is with proof directly from the post office.