Hi, I bought my child in the month of May13 of this year, and got visa as on arrival just 4 days before he completed his 3 month. I didn't find any difficulty. I carried child birth certificate attested from india and copy i've taken from MOI site of on arrival incase if any body asked. but nobody asked any document. just at airport they stamp it after checking my residency visa of wife and me You can find more details on MOI site. and infilght there is no difficutly only u've to inform airlines about the infant as they cost some extra money. otherwise its good.