Savannekhet, Laos, if you are married.
Can go alone, no financials needed, printouts of wife's ID, house book, your passport main page. Application form with 2 photos.
Most important, original marriage certificates and copies of, take an updated Kor Ror 2 to be safe, hand over 5000bht...
It opens at 8.30 or 9am, closes sharp at 11am, you collect PP between 2pm-4pm the next day, to avoid looong queues, go Tuesday or Wednesday.