Connecticut uses two main registration forms depending on whether you're registering a new vehicle or renewing an existing one

If you're registering a vehicle in Connecticut for the first time, you'll use Form H-20, the process for Motor Vehicle Registration. If you're renewing a registration that's already active, you'll use Form H-20R, the Renewal process. The Connecticut DMV also has a third form, Form H-20A, for duplicate registrations or registration transfers between owners. Knowing which form to submit saves you a trip — submitting the wrong one means the DMV will send it back and delay your registration.

You can obtain all three forms directly from the Connecticut DMV website, or pick up physical copies at any DMV branch office. Most people now submit forms online through the Connecticut DMV's online registration system, which is faster than mailing or walking in. If you do mail a form, send it to the address listed on the form itself, along with the required documents and payment.

Key Takeaways

  • Form H-20 is for new vehicle registrations; Form H-20R is for renewals; Form H-20A is for duplicates or transfers.
  • You can read all forms from the Connecticut DMV website or request them by mail.
  • Online registration through the DMV portal is faster than mailing forms and documents.
  • Each form requires different supporting documents — a bill of sale for new registrations, proof of insurance for all types, and your current registration for renewals.

What Form H-20 requires for a new registration

Form H-20 is a multi-page document that asks for your name, address, driver's license number, and vehicle identification number (VIN). You'll also need to declare the vehicle's make, model, year, and whether it's new or used. The form includes sections for the seller's information if you're buying from a private party, or the dealer's information if you're buying from a lot.

Along with the completed form, you must submit a bill of sale (Form H-10 if you're using the DMV's version, or any bill of sale that shows the sale price and date), proof of Connecticut auto insurance, and the title or proof of ownership. If the vehicle is financed, bring the lien holder's information. The DMV will not process the registration without proof of insurance — this is a hard requirement, not optional.

New registrations also require payment of the registration fee, which varies based on the vehicle's weight and whether it's a passenger car, truck, or motorcycle. The DMV website lists the fee schedule by vehicle type. If you're registering a vehicle with an out-of-state title, bring that title with you or include it with your mailed process.

What Form H-20R requires for a renewal

Form H-20R is shorter than H-20 because the DMV already has most of your information on file. You'll fill in your name, address, current registration number, and confirm that your vehicle information hasn't changed. If you've moved, changed your name, or modified the vehicle significantly, you'll note that on the form.

Renewals require proof of current Connecticut auto insurance and payment of the renewal fee. You do not need to resubmit your title or bill of sale — the DMV has those records. If your registration is expiring soon, you can renew up to six months before the expiration date, which means you can submit the form early and avoid a lapse in coverage.

The renewal fee is typically lower than the initial registration fee. Connecticut sends renewal notices by mail about 30 days before your registration expires, and that notice includes the exact fee amount due. You can renew online, by mail, or in person at a DMV office.

What Form H-20A is used for

Form H-20A covers two situations: requesting a duplicate registration if you've lost yours, or transferring a registration when ownership of the vehicle changes. If you're buying a vehicle from someone else and they're transferring their registration to you, both you and the seller will need to sign Form H-20A.

For a duplicate registration, you only need the form and payment of a small duplicate fee. For a transfer, you'll need the form, proof of insurance, the current registration, and the bill of sale or proof of the transaction. If the vehicle is financed, include the lien holder's information.

How to submit your form to the Connecticut DMV

The fastest route is the Connecticut DMV's online registration system. You'll create an account, upload scanned copies of your documents (title, bill of sale, insurance proof, and ID), and pay the fee by credit or debit card. The system confirms receipt when ready and processes the registration within five to ten business days. You'll receive your new registration by mail.

If you prefer to mail your form, print it, sign it, and mail it with all required documents and a check or money order to the address on the form. Include a cover letter with your name and phone number so the DMV can contact you if something is missing. Mailed applications take two to three weeks to process, and if any document is missing or illegible, the DMV will return the entire packet.

You can also submit your form in person at any Connecticut DMV branch office. Bring the completed form, all original documents, and payment. Walk-in service is available, but wait times vary by location and time of day. Some offices accept appointments through the DMV website, which can reduce your wait time significantly.

Common mistakes that delay your registration

The most frequent error is submitting the wrong form — using H-20 when you meant to renew, or H-20R when registering a new vehicle. Double-check the form number before you submit. The second most common mistake is forgetting proof of insurance or submitting an expired insurance certificate. Your insurance must be active on the date you submit the form.

Illegible or incomplete signatures also cause delays. Sign the form in blue or black ink, and make sure your signature matches the name on your driver's license. If you're registering a vehicle in a business name, bring documentation showing your authority to register on behalf of that business.

Mismatched VINs between the form and the title are another frequent problem. Copy the VIN directly from your title or the vehicle itself — do not guess or abbreviate. If the VIN on your form doesn't match the title, the DMV will reject the process and ask you to resubmit with the correct number.

Where to find the forms and what to do if you need help

All three forms are available as PDF downloads on the official Connecticut DMV website under the "Forms" section. You can print them at home, fill them out by hand, and submit them by mail or in person. The website also has fillable PDF versions that you can complete on your computer before printing.

If you have questions about which form to use or what documents to include, you can call the Connecticut DMV at their main phone line — the number is on the DMV website. You can also visit a DMV office in person and ask staff to review your documents before you submit them. This takes about 15 minutes and can catch errors before they delay your registration.

Frequently Asked Questions

Can I renew my registration online if I've moved to a new address?

Yes. When you renew online or by mail, you'll enter your new address on Form H-20R. The DMV will update your registration record and mail your new registration to the new address. If you're renewing in person, bring proof of your new address, such as a utility bill or lease.

What happens if I submit the wrong form?

The DMV will return it to you with a note explaining which form you need. This adds two to three weeks to the process. Before you submit, check the form number in the top right corner and confirm it matches your situation — new registration, renewal, or transfer.

Do I need to notarize any of these forms?

No. Connecticut DMV forms do not require notarization. Your signature on the form is sufficient. If you're registering a vehicle in a business name, you may need to provide a corporate resolution or letter of authority, but this does not need to be notarized.

Can I submit a form on behalf of someone else?

For renewals and new registrations, the registered owner must sign the form. If you're acting as a power of attorney or have legal authority to register on someone's behalf, bring documentation of that authority. The DMV will accept a signed power of attorney document along with the form.

How long does it take to get my registration after I submit the form?

Online submissions are processed within five to ten business days. Mailed forms take two to three weeks. In-person submissions at a DMV office are processed the same day if all documents are complete and correct. Your new registration will be mailed to your address on file.