Obviously wanting to get his affairs in order, Jeffrey Epstein executing his Will two days before he died comes pretty close to being a deathbed Will.
The Will was filed in probate Court in the US Virgin Islands. If the Will was executed properly and it's proved he was of sound mind, it may hold up in Court, but as his alleged victims are already putting in claims from his estate, I would expect this case will rumble on for a while yet.
The former financier put all of his holdings into a trust called The 1953 Trust, according to a copy of the will published by the New York Post. He signed the document on 8 August.