The object of the present invention is to provide a communication system for indemnification insurance service; the system contributes to rapid procedures to be performed from the occurrence of an accident to the arrival of a staff to the accident scene, including notification to the company of the indemnification insurance service, and certification of the location of the accident scene and the content of the insurance service of the insured, performed inside the company. The communication system for indemnification insurance service 1 comprises: a cell phone 2 with a built-in IC tag reader and a server 3, which are communicably connected with each other over the internet 4; and a management terminal 5 communicably connected with the server 3; and wherein the cell phone 2 comprises: a means 21 operable to read out information from the insurance IC tag 8, which is provided with the insurance card 6 possessed by the policyholder and stores insurance information; a means 22 for transmitting its cell phone number and the policyholder's name read out from the insurance IC tag 8, to the server 3 at a URL read out form the insurance IC tag 8; and a means 23 for receiving an authentication result from the server 3. Here, the means 21 is operable to re-read out the policyholder's name and the insurance policy number from the insurance IC tag 8, when the authentication result indicates being authenticated.