This issue of your cousin regarding his bank accounts transaction money that as freeze by the government certainly have been found something like an unusual activity in that account. The Singapores Bank will not just freeze a certain transaction if they not find it suspicious. But well, it can only be resolve by your cousin. She/he is the one that can make things settle down. He just needs to comply what the banks requires to make process your cousins transaction money. Moreover, if there is no illegal doing or issues involve then this will end up all right and fine.