I heard of money being stolen from the congregation by elders and others in the UK. The one case a CO related was of a congregation that had 12,000 GBP stolen before being caught.
The accounting procedures were revised in the early 90s. As a former accounts servant I used to do the audit on behalf of the PO. The March 1995, KM for Britain says in the announcements, "The presiding overseer or someone appointed by him should audit the congregation's accounts on March 1..."
Thirdson