I can’t conceive of a “robot check” (generally available to “Joe Sixpack” casual operators) which would reveal that my QSO partner was not an attended station. So I work the station, claim it in an applications for an award (with the appropriate fee payment), and am denied the award.
+ Extend the protocol to enable an operator to send a Turing test to his or her QSO partner, and receive the result. Wrong answer => not in log.