@Nirmal ******
If you mean the affirmation of freedom to marry, Home country or consulate. The main thing is ensuring the certified translation is correct, then approved at the Ministry of Foreign Affairs Bangkok. If you get it, (and Passports), translated jn your home country, I can almost guarantee it won't be acceptable. I initially had mine translated at an official translator in Khon Kaen, and it was rejected. Ended up having someone at the MFA do it.