Would like to know whether Oracle IPM supports 3 way matching or not & how?

-Oracle IPM do line pairing & retrieve the PO line number information based on PO number , unit price , UOM , Quantity & Description. It helps in 2 way matching.

What about 3 way matching? How the  receipt number will be called for 3 way matching? Do we require any customization for getting the receipt number.

If somebody have any documentation how the  system perform & line pairing & receipt number then please provide the same.

-Is oracle IPM do prepayment application also? How ? any document then please provide the same.

- We need to  perform validation like Invoice currency matching with  PO currency or not. Do we  have this validation at SOA level or we need to write a small procedure for  this validation & called at SOA level?