Requirements for unique customer invoice numbers

["Chris Travers" <..hidden..>]

Hi all;

THere is a general concensus that we need some sort of enforced uniqueness on customer invoice numbers.

My big question has to do with voiding invoices.  When an invoice is voided, the transaction is reversed,  and it seems to me that the easiest way to track that at the moment is to use the invoice number of the voided invoice in the reversing transaction.  Does this sound right or wrong?

Any feedback on whether I am doing something incorrect, or whether there are other cases where duplicate invoice numbers may be appropriate?

Best Wishes,
Chris Travers