I am not certain there. I think as long as you have the receipt from the bank for the payment then you can make your application after. In our case, my wife is going to VFS on friday. The one thing I do know is that once paid it expires after 10 working days!! So you need to be quite quick for that reason.

Yes. It seems that only Union bank for this purpose. Any branch of the Union bank. Your wife will need a photocopy of the data page of her passport with her and there is a charge of 150 pesos.

There is an alternative which is a managers cheque from any Philippines registered bank .....