I didn't mean the Carfax one pays for - that is often wrong, as is Autocheck. Only meant that in some cases you can get an idea what was done. When my mom bought her 987 I was able to see (via mycarfax.com) that it had been normally taken to a dealer, and that the A/C compressor had been changed.
It's just one tool among many to help document, not an end-all-be-all.
