Six serious incident referrals relating to a cathedral that was criticised in a safeguarding review were made to the Charity Commission in just over a year.
Four related to safeguarding at Bangor Cathedral in Gwynedd while two concerned financial matters.
This included allegations over large amounts of diocesan funds being spent on cathedral matters, which a whistleblower said should be deemed inappropriate as they are classified as two separate charities.
The Charity Commission said it would make recommendations for improvements to the charities concerned, while the Chapter of Bangor Cathedral said it took its "responsibilities for good governance very seriously".
A serious incident referral is a report to the Charity Commission detailing an event that resulted in or risks significant harm, loss, or damage to a charity and is a legal requirement for all registered charities.
BBC-produced Newyddion S4C was told members of the cathedral community made a whistleblowing complaint to the commission listing dozens of perceived failings at the cathedral and diocese in October.
