CJ asks ER to 'sign' his log book showing that he
did a 30 minute flight in NXXXX. No entry is made to show any dual, nor PIC
time.

CJ's signature is meaningless. ER could just as easily put the time in
his logbook and leave it at that. The time could not be counted towards
anything I'm aware of (I don't know if it even counts as total time, or
the "total time" that insurance companies care about). CJ's signature
doesn't validate anything.

Jose
--
"There are 3 secrets to the perfect landing. Unfortunately, nobody knows
what they are." - (mike).
for Email, make the obvious change in the address.