California Seller’s Permit Lookup: Resale Certificates, Regulation 1668

To run a California seller’s permit lookup, use the CDTFA’s free Permit, License, or Account Verification tool at onlineservices.cdtfa.ca.gov and search by either the permit number or the business name and address on file. The check takes about two minutes, requires no login, and pulls live status from the California Department of Tax and Fee Administration database.1California Department of Tax and Fee Administration. Online Services — Overview

Where to Run the Lookup

The verification tool lives on the CDTFA’s online services portal. From onlineservices.cdtfa.ca.gov, select “Verify a Permit, License, or Account.” You can also get there from the main Online Services page at cdtfa.ca.gov/services/. It’s the only official source; anything else is a third-party guess.

Before you start, decide which of the two search inputs you’ll use:

  • The seller’s permit number itself. This is faster and more reliable.
  • The legal business name paired with the street address on file with the CDTFA.

If you’re checking a vendor for a wholesale purchase, just ask them for the number. It appears directly on their resale certificate, CDTFA Form 230.2California Department of Tax and Fee Administration. California Resale Certificate (CDTFA-230)

Step by Step

  • Choose “Seller’s Permit” from the list of registration types. The tool covers other CDTFA accounts too, but this is the one for sales tax.
  • Pick your search method: “Permit Number” or “Business Name and Address.”
  • For a number search, type the full permit number with no dashes or spaces. For a name and address search, enter the legal business name exactly as registered and the physical address the CDTFA has on file. A minor spelling difference or an old address will cause a failed search.
  • Submit. The system checks the CDTFA database in real time and returns a status.

If a name-and-address search comes back empty, try the permit number. Businesses often register under a legal entity name that doesn’t match the trade name customers know.

What the Results Mean

A “Valid” or “Active” result means the business holds a current seller’s permit and is authorized to collect sales tax on taxable transactions in California.3California Department of Tax and Fee Administration. Sales and Use Tax in California That’s the green light for accepting or issuing a resale certificate.

An “Invalid” or “Not Found” result has several possible causes:

  • A data entry error. A transposed digit or stray space is the most common reason. Recheck and search again.
  • The number was never issued, or it belongs to a different type of registration.
  • The permit has been revoked or suspended. The CDTFA can revoke a permit when the holder fails to file returns, doesn’t remit collected sales tax, or otherwise violates the Sales and Use Tax Law. Before revoking, the CDTFA must give 10 days’ written notice and a hearing.4California Department of Tax and Fee Administration. Sales and Use Tax Law – Section 6070
  • The permit was voluntarily cancelled. The business may have closed and returned the permit to the CDTFA.5California Department of Tax and Fee Administration. Obtaining a Seller’s Permit

One more result deserves attention: valid, but with a business name that doesn’t match the company you’re dealing with. Stop before completing any tax-exempt transaction. A mismatched name can mean the vendor gave you a number that isn’t theirs, which defeats the point of the resale certificate.

Why the Lookup Matters Before a Resale Certificate

Most people run this lookup because they’re about to accept or issue a resale certificate. When a business buys goods it plans to resell, the purchase is generally exempt from sales tax. The buyer claims the exemption by handing the seller a completed CDTFA-230, which must include the buyer’s own valid seller’s permit number.2California Department of Tax and Fee Administration. California Resale Certificate (CDTFA-230)

Both parties carry risk. The buyer needs a valid permit to legally claim the exemption. The seller needs to confirm the buyer’s permit is real, because accepting a bogus resale certificate can leave the seller owing the uncollected sales tax. Two minutes of verification can save a five-figure assessment.

Good Faith Protection Under Regulation 1668

California law rewards sellers who verify. Under CDTFA Regulation 1668, a seller who takes a properly completed resale certificate from someone holding a valid seller’s permit is relieved of liability for the sales tax on that transaction.6California Department of Tax and Fee Administration. Regulation 1668 – Sales for Resale With no evidence of fraud, a seller is presumed to have accepted the certificate in good faith as long as it contains all the required elements and looks valid on its face.

Running the lookup at the time of sale strengthens that good-faith position. If the CDTFA later questions the transaction, you can point to the verification you performed. Skipping it doesn’t automatically mean bad faith, but doing it leaves a record that’s hard to argue with.

Out-of-State Vendors

The tool isn’t only for California-based businesses. Remote sellers located outside California must register with the CDTFA and collect use tax if their total sales of tangible goods delivered into California exceed $500,000 during the current or prior calendar year. The threshold includes sales by all related entities, not just the individual seller.7California Department of Tax and Fee Administration. Use Tax Collection Requirements Based on Sales into California Due to the Wayfair Decision

If you’re a California buyer working with an out-of-state vendor, verifying their permit confirms they’ve registered. An out-of-state vendor without a California permit who exceeds the $500,000 threshold is operating out of compliance, and any resale certificates exchanged in that relationship sit on shaky ground.

Penalties That Make Verification Worth It

Selling tangible personal property in California without first obtaining a seller’s permit is a misdemeanor under the Revenue and Taxation Code. That applies to sellers who never obtained a permit and to those who continue selling after a revocation or suspension. Corporate officers can be held personally liable, and after a revocation the CDTFA will not issue a new permit unless it’s satisfied the applicant will comply going forward.8California Department of Tax and Fee Administration. Do You Need a California Seller’s Permit? (Publication 107)4California Department of Tax and Fee Administration. Sales and Use Tax Law – Section 6070

Misusing a resale certificate to avoid sales tax on items you don’t actually intend to resell is also a misdemeanor. The CDTFA adds a financial penalty of 10 percent of the tax owed or $500, whichever is greater, plus interest calculated from the end of the quarter when the tax should have been paid.9California Department of Tax and Fee Administration. Regulation 1703 – Interest and Penalties Auditors catch this often, particularly when the purchased items don’t match the type of goods the business normally sells.