FORT MYERS, Fla. Fake debt collectors are becoming a growing trend. They may demand payment for a debt belonging to someone else, have no mailing address or phone number, demand immediate payment or is aggressive. Legit debt collectors can only call between 8 a.m. and 9 p.m. and are required by federal law to send a written letter outlining the debt and where it originated. Those who receive a letter, but question its validity, is advised to research the company and call it directly to verify. Those who receive a fake debt collection letter are advised to report it to law enforcement.