With no prints of Not My Sister located in any film archives, it is considered a lost film.[5] The film is included among the National Film Preservation Board's list of "7,200 Lost U.S. Silent Feature Films" as of October 2019.[6]
^"Johnson, Mabel", partial filmography in entry in studio directory under "Actresses—Leads", Motion Picture News (New York, N.Y.), October 21, 1916, pp. 78. Internet Archive, San Francisco, California. Retrieved April 4, 2020.