Whether the insured's July 4, 2016 letter constituted a valid appeal against the opposition decision of July 4, 2016
The insured failed to clarify the ambiguous filing despite a court invitation, so he is presumed to have waived any appeal against the opposition decision.
Because the addressee did not respond within the set deadline, the ambiguity of the letter remained unresolved; the court therefore treated the case as one without an appeal.