Frequently, retailers send us their seller’s permit or proof that their business is registered with the state, which is not a valid resale certificate. A seller's permit authorizes you to conduct sales and collect sales tax from your customers, whereas a resale certificate enables you to buy items from a wholesaler without paying sales tax, with the agreement that you will collect the tax from your customers.
We recommend visiting your state's government website to download the appropriate paperwork and learn more about your state's resale certificate requirements. Linked here is a list of Resale Certificate examples by state.