BARCELONA F.C. SOCCER BALL. HAND SIGNED SOCCER BALL. With (COA) Certificate Of Authenticity. (01) Certificate of Authenticity (COA). Our (COA) certificates of authenticity are issued by an authority in graphophology, an expert forensic expert, each signature is studied individually in the laboratory, photographed and stamped on an individual certificate for each signature, with an exclusive assigned number and QR code.
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