@John *********
he needs his swedish marriage documents legalized by the Thai Embassy Stockholm. Then enter Thailand on a 90-days Non-Imm-O Family Visa, and get them co-legalized by the MfA in Bangkok. After this he can get the marriage registered on an Amphur. This is the ONLY way to get his marriage centrally registered inside Thailand. For the application to the 1-year extension of stay, he needs to show a freshly printout of the Kor Ror 22 or 2 (whichever applies) from the local Amphur. The Kor Ror 3 alone is not enough proof on Immigration, of a still existing marriage