Did you need a copy of your Lao visa and entry stamp? And did you need the kor ror part of the marriage certificate as well or just the rose bordered part? (sorry for all the questions)
Prior to getting a non-B I had always gone to HCMC and this was a requirement. So I assumed it would be for Savannaket too. The Savannaket website doesn't mention about requiring one either so I suppose I can scrap it.