The proxy word format can be searched for templates on the internet, but there is no very fixed format. Mainly the title, to XXX court or judge XXX, as the first part. Then I am entrusted by XXX to act as an agent in the case of XXX and XXX, and now I would like to express my opinions on this case:

Next, I state my views and reasons, contact the evidence briefly, and highlight the key points.

Finally, this letter is addressed to XXX court, with signature and date.

As for the specific case you want to ask, how to write it, or that sentence, you should write your views and reasons concisely and emphatically after giving evidence and combining the situation at the trial. It's not that strict in practice, as long as the judge can understand your meaning and reasons.

Litigation mainly depends on evidence, not analysis. The same thing can be analyzed from different angles. Only evidence is inevitable. If you expect to convince people by reasoning, convince people by reasoning, and convince people by reasoning, it is better to collect evidence in a solid way. After all, judges are professionals, and some truths can be understood without saying. For other reasons, people already have their own opinions. You can't brainwash the judge with your golden words like persuading the parties.