Alright so I’ve been trying to sell products in this one specific brand for awhile, I bought some products from Ross and I have to get approval to sell this brand, ordered 10 products from the brand’s website, but they didn’t include an invoice so now I’m trying to figure out a distributor for this brand 
anyone know a distributor for kitchen items? Like silverware that will send an invoice? TIA
Request an invoice from the vendor/brand. Let them know you need it for business, they might be able to email you one out. Let them know your PO number, business name and address they sent the products to.
You have a receipt, yes?
As long as it meets the date and numeric requirements, submit it. I just did that and it worked. The worse they could do is reject it.
The other option would be to see if you can get a wholesale account with them. I sell toys and send a message to the manufacturers Contact Form, telling them I think their products would fit very well into our existing product line. 99.9% of the time it works. If that might work for you try it.