Confirm

After you close the report window, carefully examine the printed documents.  Use the Confirm button to record the successful printing of a document or documents and remove the document from the list of invoices or credit memos to be printed.

If the document(s) that you selected did not print, uncheck Select for each one that did not print.  This will not delete the invoice or memo; it will simply appear back in the print invoices and memos window so you can print it again.  If none of the documents printed, simply do not click on the Confirm button.