I have a supplier, of courier services, who issues a pro-forma invoice for shipments but then never forwards me a commercial invoice. This poses a problem, as I spend in excess of R5 000 p/m on courier services, and would like to be able to deduct this from income tax. I am not a VAT Vendor, so a tax invoice is not a legal requirement but I would like to have proof in the event that I am audited.
Will the Pro-Forma Invoice, along with proof of payment suffice as proof, in the event of an audit? Or must I pressure them to issue me a commercial invoice?