The Petition to Change the Name of an Adult included a legible and complete copy of the Petitioner's fingerprints. n. Can I view and print the Assumed Business Name forms on the County Clerk's website?Yes, you can do it through our online application. All Texas residents can apply for a name change under Texas Family Code Chapter 45. How to file for a name change in Texas if you are 18 years or older and want to legally change your name. This toolkit tells you how to change your name. Application for Change of Name as a Texas Notary Public - Form to change the name on a notary's commission. (Word, PDF). 2305-NB. There is a specific kind of affidavit you need to complete and sign before a notary public to support your application for a change of name. (Personalized Seal).