hello
in this case there will no serious punishment one of my friend done like that and got only few punishment.
1. 10000 QR (i don't know exact amount becuz he always tell lie about money dealings) or 3 months Jail.
2. Deportation (obviously) and putting a red seal on his passport saying he cannot comeback to Qatar.
that's all i know what happened to him. now he is drinking and driving happily in his home country.

Thanks
Alice