letters of administration
noun[plural]
ukusLAW
(in the UK) adocumentwritten by acourtthat gives someone therighttomanageadeadperson'smoneyandproperty,especiallyafter thepersonhasdiedwithoutleavingawill(= alegaldocumentdescribingwho shouldreceivesomeone'spropertyafter theydie):
anapplicationto the HighCourtforthegrantoflettersofadministration