Yes, you can delete a supplier credit note.
A supplier credit note must first be voided before it can be deleted. See Void supplier credit note for more details.
Note: If a supplier credit note is marked as deleted, you will not be able to undo the action or retrieve the deleted record.
You will not be able to undo a deleted supplier credit note.
You will not be able to retrieve a deleted supplier credit note.
When you void a supplier credit note before deleting it, it would have already removed any associated refund records. As such, there will be no further effects when deleting the supplier credit note.
Deleting a supplier credit note will not have further effects on your financial reports, as voiding the supplier credit note beforehand would have already done this.
Currently, you may not add additional internal notes while deleting a supplier credit note.