We just received a $100 Series EE bond in the mail. How can we find out who purchased it for us? Tom's response There's no reliable to find out who purchased a bond but there are two hints. If the purchaser didn't know your Social Security Number, the SSN on the bond could belong to the person who purchaed it. There's also an agent's dating stamp on the right side of the bond that will tell you what part of the country it was issued in. Other than that, you just have to ask around. Did you win any prizes recently that could account for it?