Steven Our agency have been issuing blood cards for all donors and who visit our blood center to do thier blood type since then. The ID is somewhat use also as identification card it has the person name on it address, blood type, phone number and the owner's signature. the card that we issue is color coded depends on what the blood type of that person. At the back is you can put your picture on it and and persons name whom to notify in case of emergency and signature of the laboratory personnel who did the blood type. Well this just to give you an idea on what demographic that we put in our blood card. It would be best and unique if you issue a blood card with a rare blood group or rare antibody on it. Well i guess in our part if we had this type of card well health providers may know the bearer's blood group or rare antibody present. antonio m.