If your ministry uses an overseas bank account to further your mission, you may have a requirement to file a report called an FBAR if the balance is over a certain amount at any point in the year.
Even worse, if individuals in your organization, like you Ms. CFO or Mr. Treasurer or Mrs. Program Manager, have signature authority over that account, the individuals have a requirement to disclose that authority on their personal 1040. The individuals may also need to file an FBAR individually.