Unallocated payments / payment on account

Summary:

Is there any functionality that allows a payment to be posted to a supplier account without allocating against any invoices. During implementation, we looked at prepayment, but this was not the solution we want as we do not want to allocate against anything.

The uses cases for this are:

Direct debits - where a direct debit is taken but the invoice is not yet received, we would like to be able to post the DD payment to the supplier account as 'unallocated'. Once the invoice is received, we would then match the unallocated payment to the invoice.

Refunds / supplier payments - where a supplier sends a refund or rebate payment to us but we do not yet have a corresponding document (eg. credit note) to match against, we would like to post an unallocated refund to the account and match later.