Texas Form 503 Assumed Name Certificate
Lock in the business name paperwork before you file or operate under it.
Official Source:Texas Secretary of StateChecked May 2026What is Form 503 used for?
Use this form to ask for or update a business record. It helps the agency know who is responsible and what approval you need.
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Before you start
What to know before you start.
What this form does
Texas Form 503 is used to register or update an assumed name record so the state can connect the business name to the responsible person or entity. It is mainly used to keep business filings current and to show what name approval or authority is being requested.
Keep in mind
- Using a business name that does not match the entity’s legal name or ownership details.
- Leaving required signatures, dates, or contact information incomplete.
- Submitting outdated filing information when the business has changed name, address, or responsible party.
- Confusing an assumed name filing with a formation filing or other permit application.
What you’ll need
Legal name of the business or entity exactly as it appears on official records.
Assumed name or trade name to be registered or updated.
Responsible owner, officer, or authorized signer information.
Current business address and contact details.
Any existing filing details if this is an amendment or update.
What happens after I complete it?
- 1. Prepare your information
Gather the details listed above. Use the official PDF or the guide when available.
- 2. Review your document
Check names, dates, and answers before downloading or printing.
- 3. Follow the official instructions
Confirm signatures, attachments, recipient, and deadlines. Downloading does not submit the form.
View the official PDF
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Source and saved-copy links
From the issuer: https://www.sos.state.tx.us/corp/forms/503_boc.pdf
Docgle cached copy: https://api.staging.docgle.ai/documents/2c60096d-dd55-44c5-bc65-81d7f17550a0/original
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Agency
Texas Secretary of State
Form identifier
Form 503
Estimated time
Varies
Verified
May 2026
Jurisdiction
Texas statewide
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