Send a letter via return receipt demanding validation, not verification of the alleged debt. If it's not on your credit report, that could be a good indication that the SOL has expired. If the debt is determined to be old enough to be excluded from a lawsuit for collections, then you would be within your rights to send a cease and desist letter. Only do this if the SOL has truly passed, otherwise, you can count on receiving a summons shortly afterward. In answering your post, I am assuming that the debt here is a standard consumer debt.
Send a letter via return receipt demanding validation, not verification of the alleged debt. If it's not on your credit report, that could be a good indication that the SOL has expired. If the debt is determined to be old enough to be excluded from a lawsuit for collections, then you would be within your rights to send a cease and desist letter. Only do this if the SOL has truly passed, otherwise, you can count on receiving a summons shortly afterward. In answering your post, I am assuming that the debt here is a standard consumer debt.