How to Add or Remove a Co-Owner from a Car Title in California

Quick Answer: Adding or removing a co-owner on a California car title is processed as a full title transfer, not a simple name edit. Whether both co-owners must sign depends on the conjunction between the names: AND requires both signatures, while OR requires only one. Transfers between most immediate family members can claim a use tax exemption via REG 256 (Statement of Facts), and a smog exemption when the vehicle is not due for its biennial smog. Note that transfers between adult siblings are not use tax exempt.

Life changes, such as who should be on a car title, marriage, divorce, death, or simply adding a family member. The DMV does not have a 'name edit' option. Every co-owner change is a formal title transfer with the same paperwork requirements as any other ownership change.

The critical first step is always the same: check what the title actually says.

Step 0: Check Your Title -- AND vs. OR Determines Everything

This determines whose signatures are required: AND -- both owners must sign. Neither can act alone, even for a simple removal. OR -- either owner can sign independently. One signature is sufficient. AND/OR -- same as OR, one signature. No conjunction (the names are joined only by a slash /) -- the DMV treats this as AND, so both owners must sign. JTRS (Joint Tenants with Right of Survivorship) -- all owners must sign during their lifetimes; the surviving owner releases all interest upon death with a death certificate.

Note: If your title uses AND and the other owner will not cooperate, the DMV cannot complete the transfer without both signatures. See the section below on refusing co-owners.

Adding a Co-Owner: What's Different

Adding a co-owner means the current sole owner (or all current owners) signs as the sellers/transferors, and both the existing owner and the new co-owner sign as the buyers. The new title will list both names with the conjunction you specify.

Choose AND or OR carefully: AND gives each owner equal veto power over future transfers. OR allows either owner to act independently. Most spouses choose AND; parent-child pairs often use OR.
REG 256 for family additions: If adding an immediate family member (spouse, domestic partner, parent, child, grandparent, or grandchild) and the transfer is a gift or nominal consideration, REG 256 Section A claims the use tax exemption. Note the DMV exception: transfers between siblings who are not minors are not use tax exempt.
Smog exemption: Immediate family additions via REG 256 may also claim a smog exemption in Section B, but only when the vehicle is currently registered and its biennial smog is not due. If the transfer falls in a biennial smog renewal period, a current smog certificate is still required.
Transfer fee: $15 regardless of the relationship.

Removing a Co-Owner: What's Different

Removing a co-owner means that person signs as the seller/transferor, releasing their interest. The remaining owner signs as both seller (for themselves) and buyer, to become the sole owner on the new title.

AND title: Both current owners must sign -- the one being removed AND the one staying. All parties must agree.
OR title: The remaining owner can complete the transfer with their signature alone.
REG 256 for family removals: Same use tax and smog exemption applies for transfers between immediate family members.

California is a Community Property State

Important: California is a community property state. Vehicles acquired during a marriage are typically considered community property regardless of whose name appears on the title. Adding or removing a spouse from a title may have legal and financial implications beyond the DMV process -- including effects on liability, insurance, and property rights. If you are going through a divorce, see our guide on transferring a car title after a divorce in California for the specific process that applies.

If the Co-Owner Refuses to Sign (AND Titles Only)

On an AND title, both signatures are legally required. If the co-owner will not sign:

Negotiation or mediation: Often the simplest path if the parties are on speaking terms.
Civil court order: An order compelling a co-owner to sign is injunctive relief, which California small claims courts cannot grant (small claims can award money only, CCP Section 116.220). To force the transfer you would file in regular civil court, which can issue an order directing the co-owner to sign or otherwise resolve title to the vehicle.
Attorney: For higher-value vehicles or disputes embedded in a broader legal situation (divorce, estate), a family law or civil attorney can pursue a court order directing the co-owner to sign.

Death of a Co-Owner

If a co-owner has died, the process depends on how the title was held. For JTRS titles, the surviving owner's signature releases all interest, plus a copy of the death certificate. For other joint ownership arrangements, see our guide on how to transfer an inherited vehicle without probate in California for the REG 5 process.

Documents and Fees Summary

Certificate of Title (signed by required parties per AND/OR)
REG 256 (Statement of Facts) -- for family/gift use tax and smog exemptions
Smog certificate -- if not exempt via REG 256
Transfer fee: $15
Use tax: Due unless exempt via REG 256

The detail that trips up most co-owner changes is matching the signatures to the AND, OR, or slash on the existing title and pairing the REG 256 exemption to the exact relationship, since the sibling and biennial-smog exceptions are easy to miss. Xtreet reads the current title, confirms whose signatures the DMV will require, prepares the REG 256 with the correct exemption claimed, and submits the transfer on your behalf, then tracks it in your account so a name change does not bounce back as a rejection.

Frequently Asked Questions

Do both co-owners need to sign to remove one name from a California title?

It depends on the title language. If the names are joined by AND, both owners must sign. If joined by OR or AND/OR, only one signature is required. If the names are joined only by a slash with no AND or OR, the DMV treats it as AND, so both must sign.

Is there a use tax when adding a family member to a car title?

Use tax is generally due when adding a co-owner unless the transfer qualifies for an exemption. Transfers between most immediate family members (spouse, domestic partner, parent, child, grandparent, grandchild) can claim the exemption via REG 256 Section A. The DMV does not extend this exemption to transfers between adult siblings.

Do I need a smog check to add or remove a co-owner?

It depends. Transfers between immediate family members using REG 256 may qualify for a smog exemption. Other transfers may require a current smog certificate (valid within 90 days). See Failed Smog Check in California: What to Do Next if the vehicle does not pass.

Can I add my spouse to the title without going to the DMV?

You can submit it by mail. Complete the title transfer paperwork (signed title, REG 343, REG 256 for the tax exemption, transfer fee) and mail to the DMV Vehicle Registration Operations PO Box. No in-person visit required for standard co-owner changes.

What if the co-owner on my AND title will not sign?

You cannot complete the transfer without their signature on an AND title. The practical options are negotiation or mediation if the parties are still on speaking terms, and, if that fails, a civil court order directing the co-owner to sign. Small claims court cannot help here, because compelling a signature is injunctive relief and small claims can only award money. For higher-value vehicles or disputes tied to a divorce or estate, a family law or civil attorney can pursue the order through the appropriate court.

Last reviewed by the Xtreet Research Team -- June 2026. Process sourced from the California DMV Co-Owners guide and VIRP Manual Section 1.035 (VC Section 4150.5, 9852.5), the REG 256 Statement of Facts instructions (family use tax and smog exemptions, including the adult-sibling exception), and California Code of Civil Procedure Section 116.220 for small claims jurisdiction. Fee figures verified against the DMV 2026 fee schedule.