Yes, please upload everything, including all invoices and receipts, whatever you have. When there is a line item on your bank statement or credit card statement, on audit, you would be required to provide the substantiation of the item with an additional document. The best way to audit-proof your transaction is to make it part of your daily life to upload into Hubdoc.
You can easily forward emails to your own personal Hubdoc email. Log into Hubdoc and see your email under "Organization". As time goes on you create rules within your email box to have them automatically forwarded and/or train vendors to email you and