关于反签

请问有经验的前辈们,办反签是不是一定要把学费和生活费先打给学校账户,学校才开始帮你申请MVV? 还是说他帮你申请好才要求你打款,先出具银行的经济担保就行?
谢谢

of course you need to transfer (at least fees for 1 year) to school's account in advance

you give money to school first , they do it for you then