No. Many collectors, especially when a debt is more than 90 days past due, will suggest that you make an "urgency payment," by doing things like:
Mailing your payment with a first-class stamp is fine. Or, pay by debit card or check card -- but first ask if the creditor will charge a fee. If you send your payment through the mail, you may receive further phone calls from the collector until the creditor receives and processes your payment.