This is an extension rule (^Ex) and is not part of the official rules. That being said, the idea of characters having a will is supported by the 1981 character record sheet.¹⁾

If a character dies with money or items at a moneychanger, but has not written a will, the stored wealth is lost. A will is simple statement of what happens to these items upon death. It should be sent to the DM.

Wills can be updated any time the character is in a city (see settlements). There is effectively no fee for updating a will (it's assumed to be a part of regular upkeep expenses.

• Henchmen can will up to 50% of their non-magic wealth to their master or mistress.
• Upon death and not being raised, each of the henchman's magic items will have a 50% chance to be willed to their master/mistress, and a 50% chance to be removed from the game (willed to relative, etc.). Treat every spellbook as an individual magic item. Players cannot choose which items go to their PC – random chance is diced every time.
• Henchmen will not will anything to characters other than their master or mistress.