Since making her name as the biggest female star of the disco era in the 1970s, Summer had experimented with different musical genres throughout the 1980s with varying degrees of success. For Mistaken Identity, Summer adopted a more urban style.
Steven McLoughlin – "on a Harley D" on "Body Talk"
Danny Wilensky – saxophone
The 'Heart' Strings (Suzie Schumway, Sally Schumway, Suzanne Ornstein, Ann Labin and Cathy Metz) – strings
Background vocals – Donna Summer; The New York crew: Craig Derry, Yogi Lee, Cliff Dawson, Biti Straughn, Lauren Kinham, Tracy Amos, 'Sabelle'; The Los Angeles crew: Marry Ellen Bernard, Gene Miller, Susan Macke
Strings on "Friends Unknown" arranged by Keith Diamond and Eve Nelson
Engineered by George Karras
Additional engineers: Bob Rosa, Acer Key, Peter Robbins, J.C. Convertino
Assistant engineers: Steven McLoughlin, Shawn 'Fido' Berman, Andy Udoff, Adam Yellin, Carl Glanville, Jeff Lippay, Danny & Steve, Welcome, Darien Sahanaja, Joe Seta
Recorded at Unique Studios, NY; Hit Factory, NY; Electric Lady, NY; Rumbo Studios, LA; Encore Studios, LA; Track Record Studios, LA; American Studios, LA; Presence Studios, CT; R.P.M. Studios, NY; Interface Studios, NY; My Blue Heaven Studios, NY
Studio managers: Tony Drootin – Unique, NY; Vicki Camblin – Rumbo, LA; Troy Germano – Hit Factory, NY; Bob Mason – R.P.M., NY; Daryl – Encore, LA; John Russell – Presence, CT