California form guide

REG 343: Application for Title or Registration

California title or registration application used for original registration, out-of-state vehicles, and other title/registration transactions.

Independent guide. Reviewed 2026-05-20 against California DMV sources.

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Three steps for REG 343

1Open the official source first

Use REG 343 Application for Title or Registration before filling, printing, or signing.

2Map signer roles

For REG 343, the key question is who is allowed to complete and sign each section.

3Keep the packet together

A correct form can still fail if title evidence, lien release, inspection, or ID documents are missing.

Who fills it out

The applicant or owner completes the application with vehicle, owner, and transaction details.

Who signs it

The applicant/owner signs the certification; additional documents may need seller, lienholder, or verifier signatures.

Where it is submitted

Submit with the rest of the DMV title or registration packet.

Common mistakes

  • Using REG 343 without ownership evidence.
  • Forgetting REG 31 when required.
  • Entering names that do not match the title or supporting documents.

If REG 343 is rejected

Get the reject reason precise enough to fix the next version. Ask:

Was the problem the form version, a blank field, the wrong signer, a VIN/name mismatch, missing title evidence, missing lien release, or the odometer disclosure?

Related California forms

Sources

Official sources for this page