Sally, a consumer, wrote a debt collector a letter and sent it via regular mail, stating that she does not intend to pay the debt and wants all communications to stop. At this point, the collector Group of answer choices must essentially stop all further communications. can ignore Sally's request because it was not sent by Certified Mail. must essentially stop all further written communications but can still make telephone communications. must essentially stop all further telephone communications but can still make written communications. must contact the Consumer Collection Agency. must stop collection attempts for 30 days