Eliminate calls from I.C. System collection agency, or any other debt collector, by advising the company the preferred method of communication is through writing, About.com notes. Debtors can also send the collection agency a cease and desist letter, which advises the collection agency that all communications with the debtor must be stopped. Written communication works in the debtor's favor by providing proof if the debt collection agency somehow violates the law. Cease and desist letters only apply to collection agencies.
Once the collection agency is in receipt of the cease and desist letter, it is allowed to send one more communication by mail advising the further efforts for the debt collection are terminated, that the debt collector may take certain legal actions, or that the debt collector is definitely commencing certain legal actions, About.com explains.
The cease and desist letter should be sent certified mail with return receipt, About.com advises. This ensures that the letter was sent and received by the debt collection agency. If the collection agency communicates with the debtor other than the allowed single instance, the debtor has evidence to commence a punitive action against the collection agency. If the original creditor is attempting communications with a debtor, a cease and desist letter does not apply.