[KuhakuWolf]

So as I understand we target companies, not shopping websites ?
damn I was looking for shopping websites xd

I like to separate refunds and SE of companies/products, but thats just me, in the end its the same. I do this because to refund you need the money to buy the product but to SE a product you can do it with no investment.
If you are talking about refunds, amazon is the most friendly, there are tutorials for it to

Interesting,
Can you give me an example or tutorial on SE without investment?

For example, Logitech, you can get serial number and picture of SN for someone selling on eBay.
For receipt, you can edit yourself, there are some templates on the forum you can use.
There you have the basic to SE a product from Logitech without using any money, but there is always the risk someone already used the serial to SE and you get declined, that is why some people like to spend 20 or less for SN and photo/video of SN