Invoice numbers

[the_tanya_design]

Hi, could someone please explain to me why, when I upload my Upwork Invoices as a pdf files, for some files the name of the file itself and the invoice number inside the file - don't match?

For example, T474175963.pdf has INVOICE #T474175958 inside it.

Is it a system mistake or is it any reason for that?

Thank you

[sofia2008 · Accepted solution]

The name of the file is the Reference ID of the contract, invoice number is a different number.