have you tried to apply for EP before?
do you know the maximum period they grant you is 5 years?
you seen the type of questions they ask and the kind of info they
want?
did you read the letter? they want to know how long i'll be
employed there. what if some unlucky guy, his company replied his
contract is only 2 years, will his EP be shortened?
they don't have to check this way. that's what immigration records
are for. your EP is automatically cancelled when you return.