If a muslim goes to Germany, tries to live in there and get the citizenship by telling Germans that he is a Cristian. Just for fake to achieve his goal (citizenship).
Is that a sin in ISLAM..? Please answer to my question in details {e-mail removed and thread moved}

It is foolish and against AMHD rules to post your email address.

What does your question have to do with real estate, which is where you posted it?

I am not satisfied, my cousin went to germany and told germans that he is a cristian and escaped from his country, and got the citizenship but he says he is still a muslim that was only for fake... But I & my family members say that he is guilty. So tell regarding ISLAM