Original WashedBlackDry merch (our own designs, printed on demand for you) comes with a Certificate of Authenticity in your order confirmation email. Each certified item has its own serial number in this format:
WBD-[order number]-[item number] (for example WBD-1042-01)
To check a serial, email washedblackdry87@gmail.com with the serial and your order number. We'll compare it with our order records and reply to confirm whether it matches.
Only WashedBlackDry's own merch designs get a serial. Other products in our shop are not WashedBlackDry designs and don't come with a certificate.