How to Amend a DBA Filing
Amending a DBA means filing an update with the same state or county agency that accepted your original registration, whether you're changing the name, address, or an owner listed on a multi-owner filing. Some states offer one combined amendment form for any of these changes, while others, such as California, treat certain changes as voiding the old filing, requiring a new one entirely instead.
By LLC Register · Last reviewed October 2, 2026
Comprehensive Guide
What Counts as a DBA Amendment
An amendment is any update to the information already on file for an approved DBA, short of ending the registration altogether. This commonly includes changing the registered trade name itself, updating the business address, or adding or removing an owner on a DBA filed by more than one person or entity. It's different from canceling a DBA, which ends the registration entirely, and different from a brand-new filing for a name that's never been registered before.
One Combined Form vs. Separate Forms by Change Type
How a state handles amendments varies. Some states provide a single combined form that covers a name change, an address change, or an ownership change, with checkboxes for which kind of update you're making. Others require a different form depending on what's changing, for example, a distinct amendment form for a name change versus a separate address-update form. Missouri uses one combined Form Corp. 56 for the "Creation, Renewal, Correction and Amendment of Fictitious Name," covering several of these situations on a single document, according to the Missouri Secretary of State. Check your specific state's business filing page to see which model it uses before assuming one form covers everything.
Typical Amendment Fees
Most states that charge for amendments set the fee lower than the original filing fee. Illinois charges $120 for an original filing but only $25 to amend the name, according to the Illinois Secretary of State. A handful of states, including Tennessee, use the exact same form and fee for a change as for an original filing or a cancellation, so don't assume every state discounts the amendment.
When an "Amendment" Actually Means Starting Over
Not every state treats a change as a simple update to the existing record. California's Fictitious Business Name Statement expires 40 days after any change in the facts stated in it, including the address, under the state's Business and Professions Code, which means a California business making that kind of change typically files an entirely new statement rather than an amendment form. Confirm whether your state treats your specific change as an amendment or as grounds to refile from scratch, since the process and fee can differ substantially between the two.
Who Needs to Sign an Amendment
An amendment is generally signed by the same type of person who could have signed the original filing: the individual owner for a sole proprietor's DBA, an authorized member or manager for an LLC, or an authorized officer for a corporation. If a DBA has multiple owners and one is being added or removed, some states also require the incoming or outgoing owner's signature on the amendment itself.
After You File: Updating Everyone Else
Once the state or county approves the amendment, update your bank, any licenses that reference the old information, and your contracts and marketing materials to match. An approved amendment doesn't automatically notify your bank or local licensing agency; that update is on you to make separately.
Practical Considerations
Don't Amend What You Can Just Let Expire
If a DBA is close to its natural renewal date anyway, and the change you need isn't urgent, it's sometimes simpler to let the current registration run out and file fresh information at renewal rather than filing a separate amendment in between. Compare the amendment fee against just waiting, if your timeline allows it.
Multiple Changes at Once
If you need to update more than one thing, say, both the address and an owner, check whether your state's amendment form allows multiple changes on a single filing or requires a separate submission for each. Filing them together, where allowed, saves a second fee and a second round of processing.
Keep a Copy of Every Amendment Filed
Banks, licensing agencies, and landlords sometimes ask for proof of a DBA's current, amended details, not just the original filing. Keep the approved amendment on file alongside your original registration so you can produce both if asked.
Not Legal Advice
Whether your specific change counts as an amendment or requires a new filing depends on your state's rules, which aren't always written in plain language. Check your state's official filing page, and talk to a business attorney if you're unsure which process applies to your situation.
Sources
The official sources used for this article.
Missouri Secretary of State: Fictitious name creation, renewal, correction and amendment | sos.mo.gov/CMSImages/Business/corp56.pdf?v=2 |
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Illinois Secretary of State: Application to Adopt, Change, or Cancel an Assumed Name | ilsos.gov/publications/pdf_publications/llc120.pdf |
California Legislature: Business and Professions Code Section 17929 | leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=17929.&lawCode=BPC |
Created by: LLC RegisterLast reviewed October 2, 2026
Updated: October 2, 2026
Frequently Asked Questions
Is there one form that covers any kind of DBA amendment?
It depends on the state. Some states offer a single combined amendment form for a name, address, or ownership change, while others require a different form for each type of change, so check your specific state's filing page.
Can I amend a DBA to add a second owner later?
In many states, yes, through an amendment or correction filing with the same agency that accepted the original registration. Some states require the new owner's signature on that amendment.
Does a DBA amendment need to be notarized?
It depends on the state and the form. Some states require notarization for certain amendments, particularly ownership changes, while others accept a signed form without notarization; check your specific state's instructions.
What happens if I keep operating under outdated DBA information without amending it?
The business can run into mismatches between its public record and its actual operations, which can complicate bank account updates, license renewals, or enforcing a contract if the DBA's filed details no longer match reality.
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