While there isn't a dedicated option to raise a credit note in the Sales Invoice function on Scribe, it can still be done using the sales invoice option. Simply raise a sales invoice as usual, but enter the amount as a negative (by putting a minus sign in front of the value). In the description or note box, clearly state that it is a credit note since the generated document will still say 'Invoice'.
You can then send the document to the customer as usual. The way to handle the entry on Scribe depends on what the credit note pertains to:
If you're returning the original payment to the customer: Once the payment has been sent, convert the credit note. It will then become a negative receipt entry and match the debit entry on the bank statement.
If the credit note entirely cancels the original invoice: Convert both the invoice and credit note. During the next bank reconciliation, tick off both entries. As one will be a receipt entry and the other a negative receipt entry, they will offset each other and have no effect on the bank balances.
If the credit note partially relates to an original invoice: Convert both when the customer pays the balance of the two documents. The single credit entry on the bank statement will equal the two entries on Scribe (one receipt entry and one negative receipt entry).