A former bishop has been criticised for unsatisfactory responses to child abuse allegations and risky behaviour of priests.
A watchdog review of the Diocese of Clogher, which straddles the border between the Republic of Ireland and Northern Ireland, found opportunities to prevent attacks in the past were consistently missed when concerns were raised.
The National Board for Safeguarding Children in the Catholic Church in Ireland said, however, that a line should be drawn between how the diocese used to do its business and the rules in place today.
Bishop Joseph Duffy led the diocese for about 30 years until his retirement in 2010.
The report into Clogher is one of seven being released today by the watchdog.
Bishop Liam McDaid was ordained as Bishop of Clogher on July 25, 2010.
Ian Elliot, head of the Catholic church watchdog, noted an ``unacceptable delay'' in removing a priest from ministry after a credible child abuse allegation and another case where a priest suspected of multiple abuse was not removed from ministry but transferred to another parish and eventually sent overseas for therapy.
Ultimately he was extradited back to Ireland but died before he could face trial.
“In a number of cases, allegations emerged against priests following their death making it impossible for any investigation to take place,” the report found.
“The impression formed by the reviewers of past practice was that the response to abuse concerns was often unsatisfactory and that risky behaviour was not addressed as strongly as it should have been.”
Elsewhere, the review - part of a nationwide audit to ensure bishops follow adequate child protection rules - noted that 13 priests of the diocese have faced allegations since 1975, one is classed as either in ministry or retired and two clerics have been convicted.
Clogher has 37 parishes with 73 priests across Monaghan, most of county Fermanagh, and parts of Tyrone, Donegal, Louth and Cavan and it also includes the Lough Derg pilgrimage site.
Between 1975 and November 2012 in Clogher 23 allegations of abuse were reported to gardaí and 22 to the health service.
Seven of the priests facing allegations were dead.
One priest in the diocese was known to have faced abuse allegations from a previous ministry, the report also found.
In a separate report on the Diocese of Galway, Kilmacduagh and Kilfenora the name of the former controversial bishop, Eamon Casey, cropped up for not removing a priest from ministry when an allegation was made.
The disgraced cleric fled Ireland to a mission in Ecuador in 1992 when it emerged he had a secret love-child with American woman Annie Murphy while he was Bishop of Kerry in 1974.
He returned to the west of Ireland from ministry in the UK in 2006 after he was notified of an abuse allegation.
His successor, the late James McLoughlin, removed the accused priest from ministry in 1995. The priest has since died.
Separately, McLoughlin was also criticised for not properly dealing with another complaint against one of his former clergy.
The diocese has a total of 63 priests in 39 parishes across the west, including three priests in ministry who had allegations made against them over the last four decades.
Fourteen priests had allegations made against them from January 1975 to January 2013. One has been convicted.
The watchdog found that historically there had been delays in notifying the gardaí and health chiefs of accusations during the 1990s and early 2000, but more recently there is very prompt reporting of all cases.
While prompt action was taken to remove men from ministry in all cases where credible allegations were made, the lack of written records was criticised.
The diocese was given seven recommendations to bring it up to standard, including reviewing all cases of living priests who are out of ministry.
Amnesty International reiterated its demand for a state-instituted inquiry into clerical child abuse allegations in the North.
Patrick Corrigan, Northern Ireland programme director, said: “Church-approved reviews are no substitute for a proper, independent investigation into clerical child sex abuse throughout Northern Ireland.
“The abuse knew no borders and, indeed as we know, in some instances, the abusers were moved across parish and national borders, abusing children as they went.”
Other audits looked at the dioceses of Ferns, Killala, Elphin, Waterford and the Society of African Missions.
In Ferns, where in 2005 investigators uncovered decades of abuse and cover-ups, 24 priests have faced allegations since 1975, none are in ministry and three have been convicted.
Mr Elliot noted a sea change compared to how the diocese operated since the report eight years ago, including a complainant-centred approach adopted by clergy and support staff.
He raised concerns about “sensitive information” being sent via unsecure emails instead of more detailed file notes.
Ferns is in the Dublin Archdiocese and covers 1,158 square miles in Wexford and Wicklow with 100,000 parishioners in 49 parishes. Bishop Denis Brennan was installed on March 1 2006.
In Killala, a small diocese in the West with 22 parishes there have been very few allegations of child abuse.
Three priests faced allegations since 1975, one of whom is still in ministry, and none of whom have been convicted.
Bishop John Fleming has been urged, however, that in future there should be a timeframe for canon investigations to begin once a decision on prosecution has been taken by the Director of Public Prosecutions.
Elphin, which stretches from the Midlands of Westmeath to Roscommon, Sligo and Galway, has 37 parishes, 90 churches, and a Catholic population of about 80,000.
Sixteen priests have faced allegations since 1975, eight are in ministry or retired, none have been convicted and one cleric has moved into the diocese after facing allegations in the past.
Three priests who had allegations made against them are still serving in the Diocese of Waterford and Lismore in the south east of Ireland, the watchdog found.
Records showed there were accusations made against 15 clergy between January 1975 and last October and none were convicted.
Elsewhere, just one religious order, the Society of African Missions (SMA), was audited.
It found allegations against 21 SMA Irish Province priests from January 1975 until review last January with one convicted.
Two others have been laicised and an application is being processed in Rome for the laicisation of a third, the audit reported.
Three others about whom concerns were raised remain in some form of ministry in mission countries.
“All of these cases were fully examined and assessed and the outcome in all three cases was that there were no safeguarding children issues to be addressed,” the audit found.
The Diocese of Elphin has been commended for its work in safeguarding children across all seven standards.
It said the reviewers were supplied with an impressive range of documentation which was of a very high standard, well produced and easily accessible.
Bishop of Elphin Christopher Jones, who is set to retire, said he welcomed and fully accepted the review.
He said his immediate thoughts were with the survivors of child abuse everywhere - particularly within his Diocese.
Out of 48 criteria set out for the diocese to meet - Elphin met 47 of them fully and one of them partially.
Update at 1pm:
The Bishop of Elphin Christopher Jones has described the abuse outlined in the report into his own diocese as a "serious crime" and a "grave sin".
He said he is aware his apologies fall "shamefully short" and are "totally inadequate".
But he said he is heartened by the findings of the report into current practices in Elphin.
A report into child sexual abuse in the Diocese of Ferns is severely critical of two former Bishops in the Diocese for their handling of child sexual abuse cases.
The report by the National Bord for Safeguarding Children shows 100 allegations of child sexual abuse were made in the diocese since 1975
Three priests have been convicted of committing an offence against a child in that time.
The report said that one Bishop felt bound to appoint any priest ordained to a ministry in spite of his manifest unsuitability for the position.
A second Bishop had an inappropriate and inadequate response to serious allegations and failed to recognise the need to protect children.
However the report finds that improvements have been made in the diocese since April 2002.
The Ferns report is one of seven that looks at Child protection policies.
Update at 1pm:
The Bishop of Ferns Denis Brennan has apologised unreservedly for the failings in the diocese.
In a statement, he has welcomed the report as another step on the journey towards achieving best practice and healing.
There have been three allegations of child abuse made against priests in the diocese of Kilalla since 1975, according to a report into child protection practices.
There have been no convictions arising from the allegations.
A review of child protection practices in the diocese notes the low number of cases compared to other areas.
It also highlights prompt reporting to Gardaí and the HSE.
The report is one of seven being launched today into Galway, Waterford, Clogher, Ferns and Elphin as well as the Society of African Missions religious order.
Update at 1pm:
In a statement following the publication of the report into his own diocese, the Bishop of Killala John Flemming said he hopes the findings give victims of clerical abuse hope.
He said the highest standards of best practice are now in place there.
The Bishop of Waterford and Lismore has released a statement following the publication of the report.
William Lee said he welcomes the positive outcome of the review and apologised to victims for the "enormous damage" suffered.