hi I agree with ezdan1016590. eventhough it is mention 1 month in the visa it is for 3 month visa , some times they are giving for 6 months too.If they want to stay morethan 1 month they have to goto medical with in one week after arraival. you can pay QR400 and extend up to 2 months.
when they are coming to doha in immigration will put stamp with date upto when one month visa is valid