This is a brand new, factory sealed, officially licensed Back To The Future/Universal Studios art print including a certificate of authenticity. The certificate number you receive will be entirely random. This is a limited edition item. The full edition size is 5,000 total prints. Here is the manufacturer's full description directly quoted:

"Produced on 300gsm Satin paper at one of the oldest printers in the UK, this officially licensed Art Print is limited to only 5,000 worldwide and comes with a certificate of authenticity. This Art Print is 14x11” in size."