If you wish to sell Diablo III keys, you must provide photographic proof of legal ownership. This includes a picture of the game box/CD Key (located on the game sleeve) for physical copies and receipts for digital copies. Any topic not containing "proofs" will be locked, and the poster infracted. If you're selling a Battle.Net account with Diablo III already activated on it, you must provide a screenshot of your Battle.Net account showing the D3 game as "active". If you're selling a specific character, you must include a picture of the advertised character(s) including stats and gear AS WELL AS
Batttle.Net account proofs.
Here are examples of proofs required.
Physical CD Key:
Digital CD Key: