Article / Updated 03-26-2016
To become canonized as a saint, a perfect track record isn’t required (or possible). Hence, being sinless isn’t on the list. So, what is required for sainthood?
Two verifiable postmortem miracles
Note: Canonization (sainthood) requires two miracles, whereas beatification (blessed) requires only one.
Evidence of having led an exemplary life of goodness and virtue worthy of imitation, having died a heroic death (martyrdom), or having undergone a major conversion of heart where a previous immoral life is abandoned and replaced by one of outstanding holiness
Formally declared saints are chosen ultimately by the pope, but only after a thorough investigation of the life, writings, and legacy of the saint candidate.