Sorry, pal, but that's the antithesis of undeadedness.
That guy's problem is that he has been judged dead, but not really most sincerely dead.
I would suggest that he try to get a GED, work for forty years like the rest of us, and then put in for retirement.
If you want to be creative, just tell everyone your birthday is on leap year day.
Well, he’s currently legally dead, hje wants to be made legally undead.
Judge says “no dice, you’re dead. No talky.”
Hilarity ensues.