Texas
Qualifications
Domestic or foreign corporations, LLCs, limited partnerships, LLPs and other foreign filing entities regularly doing business in Texas under a name other than their legal name must file an assumed name certificate with the Secretary of State.
A domestic or foreign corporation, limited liability company, limited partnership, limited liability partnership, or other foreign filing entity that regularly conducts business or renders a professional service in this state under a name other than its legal name (the name stated in its certificate of formation or comparable document) must file an assumed name certificate with the secretary of state.Official source
Official agency page
Form 503 — Instructions for Assumed Name CertificateOfficial source
Agency guidance
The certificate can last no more than ten years. Renew by filing a new certificate within six months of expiration.
The assumed name certificate shall be effective for a term not to exceed ten years from the date the certificate is filed and may be renewed by filing a new certificate within six months of the expiration of the original certificate (TBCC § 71.151).Official source