FCD account is fine. Some banks only have statement accounts not a passbook. You have to get copies of statements and the proof of deposit letter no more than 7 days before you go. Day of or before is best. If you don't have a passbook they will keep asking for it, but they usually get it after the 4th or 5th time. I've only used FCD accounts fir the last 7 years
Michael Mersi a DNA test could be necessary to prove paternity but doesn't give you parental rights to a baby born out of wedlock in thailand only a court order can do that.