there's no way for us to know if the issuer made a mistake but you should not receive both a 1099-INT and a 1099-OID for the same interest. contact the issuer to make sure but it is possible that both need to be reported. one is the actual interest you received and the other is because there was a discount on the security you bough which under the tax laws requires you to pick up the a portion each year over the the term of the security.
