Kevin Smith and Jason Mewes both signed this 8x10 photo after their show on 6/21/17. Proof picture and/or other information available upon request. This item has been certified authentic by JSA (James Spence Authentication). You can verify the JSA serial number on their website spenceloa.com. That number is, JJ52399. Payment must be received within three days of purchase unless otherwise specified. Thank you!