One of the most important responsibilities a Responsible Master Plumber (RMP) has is maintaining a current Certificate of Insurance (COI). The following TSBPE How-To Guide is a step-by-step walkthrough of exactly how to update a COl using the Online Licensing System (click “Online Login” at the top right of this page). Remember, there is no fee to update an existing RMP’s Certificate of Insurance. Download a printable version of this How-To Guide here.