A credit collection company cannot call you at work if you have told them you cannot take calls at work. If you are receiving credit collection calls at work, you should write down as much information as possible about the phone call. Then you should tell the credit collection company that you are not allowed to take calls at work. If they call again, document it and save any messages. Any calls received after you’ve told them not to call may be a violation of state and federal credit collection laws.