A legitimate right cannot be obtained through illegitimate methods. Even in today’s laws, illegally obtained information cannot be used as legal evidence. Hacking into someone’s account or creating fake accounts to test people are not legitimate, and therefore cannot be used to run background checks.
A girl may not be able to do this background check on her own. This is natural. It is not in vain that The Almighty God requires the supervision of girls’ families for the validity of marriages. The background check is the duty of the girl’s family:
In case of a marriage proposal, the girl must tell her family about the suitor. She can ask the suitor simple questions about his work, workplace and house, and inform her family of these. The parents or uncles, brothers, etc. must go and investigate if this information is correct. They can even see the friends or colleagues of the suitor to learn more about him. If the suitor is honest with his intentions and will to marry her, he would understand this. This is the natural and essential way of running the background checks.