So it was brought to my attention this mismatch between flightaware registry and FAA’s, see for yourself
http://flightaware.com/resources/registration/N5343M
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N5343M
In particular flightaware lists the N number as registered and gives some info, whereas FAA lists it as deregistered and lists the last registration to a gentleman that does not appear listed on flightaware registry.
This created some suspicion in some people. My question is what exactly could cause such a mismatch - did FAA delete the registry or is it something else?