What does control of a deposit account typically require from the secured creditor?

Control of a deposit account generally requires a control agreement with the bank that holds the deposit account. This agreement is crucial because it establishes the secured creditor's rights to have access to the funds in the account and to direct the bank on how to handle the account, especially in the event of a default by the debtor.

A control agreement typically ensures that the secured creditor has adequate security interests in the deposit account by giving the creditor the authority to control the account and redirect payments, thereby enhancing their position as a secured party. This legal framework is essential to protect the creditor's interest, allowing them priority over other claimants regarding the funds in the account.

In contrast, the other options do not meet the legal requirements necessary for control under typical secured transactions laws. For instance, simply requiring the bank to agree on interest does not grant control; possession of physical cash does not apply to a deposit account; and having a signed contract with the debtor alone does not establish control over the deposit account without involving the bank through a control agreement. Hence, the requirement of a control agreement is the definitive aspect that facilitates the secured creditor's control over the deposit account.