If applicable, the bank or credit card company may require that you include certain documentation. Contact your bank or credit card company to determine what additional information, if any, may be required.
Photocopies, not the original copies, of any relevant documents should be included with the letter (unless otherwise required by the bank or credit card company). If you suspect you may be the victim of identity theft, you should keep a copy of all written communications with the bank or credit card company and maintain a written summary of all oral communications.