Why Personal Account Deposits Happen
Depositing trust or estate funds into a personal account may sound alarming. However, it is not always improper. A fiduciary might deposit a repayment check or handle a distribution that passes through their own account.
The bank that receives the deposit does not have to ask why. It can accept the deposit and process withdrawals without liability.
If a fiduciary makes a deposit in a bank to his personal credit of checks drawn by him upon an account in his own name as fiduciary, or of checks payable to him as fiduciary, or of checks drawn by him upon an account in the name of his principal if he is empowered to draw checks thereon, or of checks payable to his principal and endorsed by him, if he is empowered to endorse such checks, or if he otherwise makes a deposit of funds held by him as fiduciary, the bank receiving such deposit is not bound to inquire whether the fiduciary is committing thereby a breach of his obligation as fiduciary.
A.R.S. § 14-7508Actual Knowledge Remains the Threshold
The bank only becomes liable if it has actual knowledge the fiduciary is breaching their duty. Suspicion alone is not enough. The standard is actual knowledge or bad faith.
For beneficiaries and families, this is a reminder. Banks do not monitor fiduciary behavior. If a trustee or agent mixes funds improperly, the remedy lies with the beneficiaries or the court.
As a result, choosing a fiduciary you trust is critical. Building in oversight through co-trustees or regular accountings is the best safeguard.