What do I do with this fake?

Found a fake �1 coin with the rest of mine when I Was looking at all the designs. Its a scottish rampant lion one with 'DECUS ET TUTAMEN' stamped poorly and off centered round the side (the wrong writing as well should say 'NEMO ME IMPUNE LACESSIT'). Its heavier and also the head side is stamped on off center. What do I do with it?