I have written out such a letter, and given it to my attorney - to be opened privately by him upon my death. Since he is my best friend (who does not know about Nancy), the letter is to help him understand (and suggest where he can get more information about CD/TG, if he wishes to). It instructs him which safe my things are in, the combination (which nobody but me knows), and that he is to remove them, privately, and deliver them to a thrift store. It also includes a codicil to the will itself, stating that the contents of that safe are for him to take, and that part of the validation is that I have given him the combination, which nobody else knows. There are things in there he will then give to the family, but most of its contents will go away.