HomeschoolDad:
As much of a “hardnose” as I am, I have even wondered if the Church could streamline the annulment process down to a personal interview with the person seeking the annulment, have them to write up an affidavit of what happened and when, swear it out under pain of mortal sin of perjury, and simply let that be the “evidence” of nullity. I could get behind that.
While the process itself could never be quite that brief, the evidence in some cases is nothing more than the testimony of one of the Parties. Sometimes, Judges conclude that the evidence is sufficient to declare the marriage invalid. One of the modifications made by Pope Francis back in 2015 was to change the wording of one of the canons so that it is understood that there are times when the testimony of one Party can be seen as “full proof” (see the new c. 1678).
Personally, I don’t think he changed anything in this regard: even before his modifications, there were times when the testimony of one Party was seen (by some Judges, anyway) as sufficient proof of invalidity: the old canons allowed for that possibility.