All public documents sent by administrative executive agencies are covered by the organization's guard and record the name of the contractor, telephone number, etc. If you have any questions, you can call 104 to inquire about the telephone number of the organization and call for confirmation. In addition, the branch office has a network for public inquiry. If you receive a letter signed by the branch and request remittance to your personal account. people should be especially careful in prevent of being deceived.