I have a dispute with my neighbor about the pruning of his trees. Is it true that before I can appeal to the judge, I have to try to deal with him?

Yes, it is now mandatory to seek an amicable solution before starting any legal proceedings.

Thus, Article 56 of the Code of Civil Procedure (included in the provisions common to all jurisdictions) provides that "Unless there is a legitimate reason for the urgency or the matter under consideration, in particular where it concerns the assignment specifies ... the diligence undertaken with a view to reaching an amicable resolution of the dispute ".