(a) If the comptroller finds that a person has sold unstamped cigarettes, the comptroller may require the person to pay the state through the comptroller a sum equal to twice the amount of stamp tax due.
(b) If the person does not furnish the comptroller evidence that enough stamps were purchased to cover unstamped cigarettes purchased, it is presumed that the cigarettes were sold without the proper stamps.
Official text of the Texas Tax Code as published by the Texas Legislative Council.