One less post-divorce snag to worry about -- TMZ has learned, Kim Kardashian won't have to legally reinstate her famous last name ... because she never changed it to Humphries in the first place.
TMZ broke the story ... Kim planned to change her last name to Humphries soon after her wedding -- but it never happened.
Sources close to Kim tell us, the reality star really did intend to take Kris' name -- but since the marriage only lasted 72 days ... she never got around to it. How convenient.
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