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About me

Thomas F. Mastin, IV (also known as T Mastin) is an attorney who practices in the areas of Probate (Wills, Administrations), Guardianship, Real Estate and General Business. Mr. Mastin has been a sole practitioner since 1985. Prior to that time, he was an associate with the firm of Garrett and Settle in Fort Worth. Mr. Mastin graduated from Trinity Valley School, Fort Worth, Texas and received his under graduate degree from the University of Texas at Austin with a BBA in finance. He received his law degree from St. Marys University at San Antonio, Texas in December, 1978. Mr. Mastin has also been active in numerous professional and charitable organizations, is a past Director of the Tarrant County Probate Bar Association, past Co-Chair of the Tarrant County Probate Bar Litigation Seminar, past Chairman of the Senior Citizens Committee of the Tarrant County Bar Association and Elder Law Handbook Committee and on the board of directors of Guardianship Services, Inc. (GSI). Mr. Mastin appreciates the opportunity to speak to groups on the importance of planning and being prepared before assistance is needed.


Practice areas


  1. Guardianship: 20%
  2. Probate: 20%
  3. Wills: 20%
  4. Elder Law: 15%
  5. Other: 25%
  6. More 



Hourly ($275-300/hour)

Payment types:

Cash, Check

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Contact info

Thomas F. Mastin, IV

1009 Henderson
Fort Worth, TX, 76102


TXEligible To Practice In Texas 197901/09/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Association namePosition nameDuration
Guardianship Services, Inc.Director2008 - 2013
Senior Citizens Liaison Committee and Solo Practitioners Tarrant County Probate Bar AssnDirectors2003 - 2005
Tarrant County Bar AssociationMember1979 - Present
Fort Worth-Tarrant County Young Lawyers AssociationPresident 1985, Director & Officer 1983-19851979 - 1988
School nameMajorDegreeGraduated
St Mary's University of San Antonio School of LawLawJD - Juris Doctor1978
University of Texas System, AustinFinanceB.B.A1973
Speaking engagements
Conference nameTitleDate
People's Law schoolProbate and Guardianships2010