This can take the form of verifying an existing history put together by an earlier owner, filling in gaps in the ownership/racing history for FIA paperwork or investigating a claimed history for a car that is for sale.

The work is comparable to forensic investigation, involving long hours of patient searching through newspaper and magazine archives, talking firsthand to previous owners and other personnel (e.g. mechanics, team managers) involved with the cars in period and a close study of period photographs to identify individual characteristics peculiar to the car in question.