@Phil *********
that's my usual method too. Just have several copies of whatever you can think of that they might ask for.
One year, after several years of the same document required, in two sets, they suddenly wanted 3 sets 😂.
And the photos had to be real photos, like the original, on set#3, but on set#2 copies were acceptable. ¯\_(ツ)_/¯
Now I just always have extra photos, extra copies etc.
It's not like it costs a fortune to do that either, or take lots of time.
Bank papers, 200 baht, and usually not more than 30 minutes spent.
Photos, a couple hundred baht if needing the family/address photos. Any photo shop can print out those in minutes.
If for marriage, 20 baht at the ampur (city hall) to get an updated marriage certificate, and in our local one, that is 10 minutes on average.
Then for all the copies of everything, well, copy that at home, or pay 50 baht or something like that in a copy shop. Again a few minutes.