Certainly, if the PCs are all chaotic neutral, without family attachments, and operating entirely outside of the reach of effective authority, laws and customs will have little impact on them either as the voice of conscience or in the person of NPCs. Since that situation is a problem I don't have any interest in, I won't bother offering a solution.
If the PCs are busy saving the world/kingdom/etc., you'd think, in a case that dire, all available assets would already be delegated to the effort of saving the world, and that the new PC would accordingly come into the party unequipped. If not, one has to wonder what he was doing with all that stuff last adventuring session, when the world was in peril.
And if laws are ignoring chattels with values on the order of a merchant's ship (10,000 gp for a sailing ship, 8,000 gp for a +2 sword) when it comes to inheritance, that implies some quite interesting societal features in general.