If you cannot get to a New York DMV office because you are serving, you can authorize someone else to register or sell your vehicle for you.
Complete the form that matches the transaction: the Affirmation for Renewal of Registration for Absentee Owner to renew a registration, or the Certification of Disposition of Vehicle on Behalf of Absentee Owner to change ownership. Give the completed form to the person acting for you.
The completed DMV absentee owner form for the transaction, and your vehicle and registration details.