Invoice payment for inter company transaction

Hi Experts.

Our scenario is we have 2 company codes

X and Y.

Till invoice verification we use company X. now while payment we have to use Y.

Now question is there is no liability in Y company code. No vendor master data. No Vendor bank detail. So how to make payment to vendor.

Please guide. What are the accounting entries and which t code to use.

Regards

Zunaid