Supplier payment on account
It would be useful to be able to make a payment on account for suppliers, so that clients do not end up creating spend money transactions and bills which duplicates expenses.
It's also better to be able to see if you are in credit with the supplier on the aged creditors reports, in the same way Sage Line 50 works.

Hi Suki, to ensure your accounts continually balance payments do need to be matched to transactions entered in your org. It would be possible to create an Overpayment or Prepayment to reconcile a payment in your bank account prior to a bill being entered. Then once the transaction is raised it can be matched with the credit from the Prepayment or Overpayment. As you raise a bill for a supplier where there is credit outstanding you should be prompted to see if you'd like to allocate this.