Is there a way to write off multiple small amounts (debtors / creditors) from old transactions without having to do them all individually?

Hello Melady, You could do a journal with the debtors/creditors on each line and naming the supplier/customer on each creditor/debtor line and then the final line being the account you are writing things off to, you would still need to then go into the invoice/bill to then apply the journal against the transaction and close it off. There may be other users who can suggest a different way they have done this on the Community, however.