The six-member enquiry committee also said the head of Syro-Malabar Catholic Church, Cardinal George Alencherry, "seems to have fully known and involved" in the alienation and purchase of lands by the archdiocese during April 1, 2015 to November 30, 2017.
The panel comprising priests was appointed by Alencherry, who is also the Major Archbishop of the archdiocese, after some priests and faithful accused him of having sold prime land of the archdiocese for "a very low price".
The committee, in its report accessed by media, said: "There were numerous instances of violation of canon laws and civil laws along with the lack of transparency and collegiality."
It also said the allegations about the land transactions have created a moral crisis among the members of the church and the general public.
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"People who are responsible for the crisis should be tried according the law of the church and necessary action should be taken for the violation of the civil law," it said.
It said as the head of the Syro-Malabar Church, Cardinal Alencherry should have taken utmost care in respecting the provisions of the canon law.
A particular law of Syro-Malabar Church, which was promulgated by the same Major Archbishop, had been violated by him on more than one occasion, the report said.
As it was widely discussed in the print, visual and online media, the issue has taken a colossal form, creating confusion and faith crisis, the committee said.
"People have started suspecting the credibility of the church, especially the bishops and priests. It will adversely affect the ethical stance of the church, especially such one promoted by Pope Francis.
The Syro-Malabar Church has over 30 dioceses in the country and four outside-in the US, Canada, Australia and Britain-serving over 5 million faithful.