what you are describing apeears to say that you are a signatory to the account but really do not operate the account i.e. you have signature authority but no financial interest ( that is how you report on the FBAR ) and on schedule-B bottom you select signature / nominee powers but not report the interest income because you do not receive any benefit from it. This is the case for many persons in the USA whom have either emigrated or working in the USA with parents in another country ( where very often the signature authority is given to the USA resident for purposes of downstream access to the account should the account owner become debilated or otherwise unable tto operate the account. Don't worry, as long as the FBAR and the schedule B say the same thing you are OK. Good luck
