@Fionja whether it is a Bank or a broker that holds monies for you for sole purpose of investment activities by you or for you , it is a custodial account.
Accounts in a financial institution that you own or have signature authority over are generally non-custodial -- either savings or deposit accounts ( because you do the operating )
Are you trying to fill out the FATCA form or what ?
Is there more I can do for you ?
