A more thorough explanation:

In foro contentioso is a Latin term that means "in the forum of contention or litigation." It refers to a legal action that has been contested in court, and the parties involved have been fully heard on the merits of the case.

For example, if a person sues another person for breach of contract, and the case goes to trial, the decision made by the judge or jury would be considered a decree in in foro contentioso because the parties were fully heard in court.

It is important to note that a decree can still be considered in foro contentioso even if the parties were not fully heard. However, the decision may not be as strong or reliable as one where the parties were fully heard.

John and Jane are in a legal dispute over a property line. They both present their arguments in court, and the judge makes a decision based on the evidence presented. This decision is considered a decree in in foro contentioso because the case was fully litigated in court.