If a driver wants to add one or more endorsements to an existing CDL: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question If a driver wants to add one or more endorsements to an existing CDL: Answers The endorsements can be added free of charge. One endorsement may be added without a fee. The endorsements can be added for a fee. The CDL cannot be updated. Explanation After a CDL has been issued, there are fees for any added endorsements or license class upgrades to the CDL.