Chapter 10. Supporting Documents Supporting documentation is required to complete any IRP transaction. Depending on the circumstances additional documents may be required with your application. The following is a list of common supporting documents with an explanation of what each document is. Please read the information carefully. Failure to submit the proper documents will delay the processing of the application. Certificate of Origin (CO) This is the legal document issued at the time a vehicle is manufactured. The dealer will complete the back of the Certificate of Origin. Be sure the date sold, the odometer reading and the purchase price have been completed on the back. The dealer (seller) and the purchaser are required to sign the appropriate location on the assignment. The Certificate of Origin must be imprinted with a statement of compliance by the manufacturer indicating that the vehicle is California-Certified. Statements that comply: * This vehicle has a California emission system * This vehicle meets/satisfies Massachusetts emission standards * This vehicle is certified/legal for sale in Massachusetts * This vehicle is certified/legal for sale in 50 states Certificate of Title A Certificate of Title for a motor vehicle is a legal document issued by a state to certify the vehicle's ownership and to indicate the lienholder that financed the purchase of the vehicle (if applicable). The dealer must complete the reassignment on the back of the title at the time of sale.