Click on the Resources tab on our website. Click on the icon for “NJ DEP Generator Identification # Registration Form”. This will open up the Generator Identification registration form. Print this form out and answer all of the questions. If you need help completing this form, feel free to give us a call. Mail the completed form and your registration fee to the address listed on the last page of the instructions. This fee gets mailed to NJDEP, not MED-FLEX. We have nothing to do with the registration or fee. Once your application has been received and processed, the NJ Department of Environmental Protection will mail you an official letter listing your Generator Identification number.