Almost all the PRCA's member agencies have passed the Consultancy Management Standard (CMS) now it is a condition of membership for the first time.
The CMS became a requirement for all PRCA members at the turn of the year.
Although an official statement on new exiles will be made in two weeks, following a meeting of the PRCA management board, the body said this week predictions of 90 per cent success may even have been on the low side.
No agencies are thought to have failed the CMS, a wide-ranging series of tests and assessments on all aspects of running an agency.
PRCA director-general Chris McDowall said all agencies wishing to pass had cleared all hurdles by 31 December and only agencies declining to try would receive his goodbye letter later this month.
The section which caused most problems was Service Delivery, one of ten categories but worth 90 of the 360 points available.
More than ten agencies are thought to have failed Service Delivery. The section includes new business, account management, internal records and controls and dealing with complaints.
'Some agencies left two years ago when they saw the writing on the wall,' said McDowall.