This forum is to discuss different features/issues of Oracle Financials modules ( GL - General Ledger, AP - Accounts Payable, AR - Accounts Receivable, FA - Fixed Assets & CM - Cash Management ).
Is there any provision to enter the prepayment type in supplier master (standard)? I could not find one. You can enter the value in DFF and try personalization.
The default is 'temporary' which is, in general, frequently used.
As I said in my post earlier in this thread, you should capture the value in DFF in the supplier or site level, then you can default the value in invoice by form personalization (or by customization).