Send the letter via certified mail
Debt Collectors Name.
Re: Account Number
To Whom it May Concern:
I am writing to notify you that under the Fair Debt Collection Practices Act, I am requesting that you to cease all communications with me. Please do not contact me at home or at work through any form of communication. Any future communication that violates the Fair Debt Collection Act, will be reported to the Federal Trade Commission. Thank you for your prompt attention to this matter.
Your Name and Signature