Invoice Number Pattern on Return to Supplier

Hi All ,

This is just a question ,  what pattern does an invoice number follow when Return to Supplier transaction is performed.

Will it always be in receipt_number-sequence pattern or invoice number pattern will change when the OU and supplier site is setup with Buyer/Seller code.

Please advice.

We don't see Debit memo created with Gapless Invoice Number sequence , is there a setup which drives this for Debit memo ?

Thanks,
Lokesh