How to deal with payment of vendor to us (credit notes I guess)

Normally I use F07 for outgoing payments, it's linked to vendors, but how to deal with incoming payments of vendors?

We got paid two invoices(credit notes I guess) and I want to put them under the right vendor, but how do I do it?

I can't use F07 I think because I need to use positive amounts (for normal purchase invoices) and can't use negative amounts in this transaction. F08 is for ingoing payment but that session is linked to customers I thought..not for vendors?

How to deal with this kind ot transactions? What transaction can I use the best for payments like this

(we got paid an amount , no invoices yet, but I know the vendor).