If you don’t have a print out but your landlord or whatever did it online anyway you’ll be fine. I went to chiang rai immigration and they didn’t ask for it as they can see it online
You’d think since we (uk) can get 60 days visa free here they’d have a mutual visa thing for Thais wanting to visit uk. Tell them she’s from Syria or something claiming asylum, they let her in easier.
Me and my gf gave up on the idea so we just staying put in Thailand and my family will visit here instead.