My opinion would be as long as you are issuing the debit card to the trustee who has access to the account, there is no problem. Of course read thru the Trust Agreement carefully to make sure of what rights the Trustee has under the Trust Agreement - I can't imagine it would forbid debit card usage, but you never know. The way I look at it is if the Trustee has access to the account thru other methods (teller, mail, phone, etc), whay should a debit card, or even online access be different. Of course, these are my views and are not legal nor are they my employers.