Res Inter Alios Acta
res inter alios acta n[Late Latin, literally, thing done among others]
: something transacted between other parties NOTE: This term is used in reference to matters not involving the same parties as those in litigation. Evidence of such matters is generally inadmissible.
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.