A resale certificate is something you need to get from your state that exempts your business from paying state sales tax. It's not something eBay provides.
If you have a resale certificate you can add it to your eBay account:
https://www.ebay.com/help/buying/paying-items/paying-tax-ebay-purchases?id=4771#section2
There's also a retailer-issued resale certificate that basically says you intend to resell goods and it's documentation you can provide to a wholesaler. Is that what you're asking about? If so, eBay does not issue them.
Read more here: https://www.salestaxinstitute.com/sales_tax_faqs/resale_certificate
