Lot of long fuzzy useless discussions and suites of wrong questions/answers would be avoid if people were using the correct vocabulary. Mainly true on ThaiVisa where very often the question is not what his writer wants to ask!
Apart from the fact that it's not a Visa, how did you get one without a number ??
As far as I know, every Visa, Extension, Work-Permit, Re-Entry permit, etc. has a number !
As i said above i use the number off of my re-entry permit as told to me by the immigration officer.
Sorry for confusing you. i didn't realize i needed to be so explicit. Next time i will use the phrase "non "o" visa based on marriage for those few that never of heard of such common terms like marriage visa or business visa. FFS even at immigration you ask for marry visa application or ekasan visa panrayaa thai.