Why do some receipts in some shops in Thailand indicate "authorized tourist"?

Why do some receipts in some shops in Thailand indicate "authorized tourist"? - Crowded Street With Cars Passing By

Why do some receipts in some shops in Thailand indicate "authorized tourist"?

Example from Tops supermarket in Bangkok:

thailand shopping bangkok tourism

Pictures about "Why do some receipts in some shops in Thailand indicate "authorized tourist"?"

Why do some receipts in some shops in Thailand indicate "authorized tourist"? - Women in Sitting on Floor Rug

Why do some receipts in some shops in Thailand indicate "authorized tourist"? - People Walking on the Street

Why do some receipts in some shops in Thailand indicate "authorized tourist"? - People Walking on the Street

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Images: suzukii xingfu, cottonbro, Chait Goli, Chait Goli