What is the difference between a Credit/Void/Delete?
Credit
A reversal of a charge(s) on the invoice. A credit can be for the whole invoice or just for a single line item on the invoice. The invoice will remain in the system with the credit. The invoice will be unable to be deleted with the credit attached.
Void
A void credits the invoice completely, reversing all transactions on the invoice except payments and refunds. In addition, it releases the charges so that they can be re-invoiced. This is typically done because the rate was incorrect, there were taxes, or the length of stay was incorrect. A void can occur if there are additional transactions on the invoice: payment, credit, refund. A voided invoice cannot be deleted in the system and will remain indefinitely.
Delete
A delete for an invoice is like the invoice never existed. A delete cannot occur if there are additional transactions on the invoice: payment, credit, refund, void. The invoice number will not be used again. Since the invoice no longer exists in the database, there will be no history of who deleted it.