A Texas Assumed Name Certificate for an Incorporated Business or Profession is a legal form that is filed with the Texas Secretary of State in order to register and operate a business or professional practice in the state of Texas. It is also referred to as a “Doing Business As” or “DBA” certificate. There are two main types of Texas Assumed Name Certificates for an Incorporated Business or Profession: a Certificate of Assumed Name and a Certificate of Fictitious Name. The Certificate of Assumed Name is issued to a business or professional that is already incorporated in Texas and is used to operate under an assumed name. The Certificate of Fictitious Name is issued to a business or professional that is not already incorporated in Texas and is used to operate under an assumed name. Both certificates must be accompanied by a registration fee and submitted to the Texas Secretary of State.