If your dba was filed by you as an individual you are correct it lasts for 5 years, and should still be valid unlessyou re-registered the dba under the LLC. If you did , prudene says re-file.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
You will need to file an amended statement, pay a new filing fee, and re-publish -- a small price to pay to keep your business name attached to your business.
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You have been given advice by two prolific and respected attorneys in Mr. Daymude and Mr. Doland. I always read their responses and am always impressed. Other than that, I do not have anything to add.
I am an Arizona attorney. AVVO does not pay us for our responses. Simply because I responded to your question does not mean I am your attorney. In Arizona a non-lawyer is held to the same standards as an attorney so there are dangers to representing yourself. This is for informational purposes only and should not be considered as legal advice. If you require legal assistance an in depth discussion of your case is needed as there are many other issues to consider such as defenses, statute of limitations, etc.
You are correct that a Dba is good for 5 years. The fact that you set the LLC up with the same name does not effect the Dba,. unless you assigned Dba to the LLC.
I hope this helps
W. Randall Sgro
1609 Cravens Ave
Torrance, Ca. 90501