In legal documents (ie wills, power of attorney etc), how important is it to have everyone's full legal names? I'm dealing with something now where various parties are known by different and not necessarily legal names, or use short forms of their names on many other legal documents (ie passports, SSN), or have married names, etc. Should one always use the legal (ie birth) name, or the one the person is best known by? What about middle names? Does this have to be consistent with all parties mentioned in a document, or can you have some in some form (ie shortened name/middle name/married name) and some in others? In the case of wills etc, does it make sense to also note the relationship of the person, ie. sister of, father in law of, etc? There's no question who all these people are in the situation I'm working with (ie no worries of fathers and sons with the same name), but I do want to avoid any chance of quarrel or challenge if this isn't perfect. Thanks!