1) Credit Reports often contain employment information reported by creditors or companies whom you've applied for credit from. 2) Unless you've notified them that it's inconvenient for them to contact work, they can. The amount of third-party contact is limited (if they ask your supervisor to verify your contact information). 3) Every company is different. (HOWEVER, if you tell them it is inconvenient for them to communicate with you except for writing, you are cutting off most third-party communications as well.) 4) Send them a letter demanding validation of the debt, and telling them that it is inconvenient to communicate with you via any means except for in writing; and it is inconvenient for them to have any third-party communications.
