There will be instances when new persons would come into your life. These persons could be a new applicant, a new neighbor, a new suitor, a new friend, a person proposing a business venture, someone offering services or products, or someone claiming to be a distant relative or a family friend from long ago. Whatever the origin be of the new acquaintance, it might be a good idea to do a background check before getting into a deeper relationship with them.
Today, it seems doing back ground check is a reasonable and understandable move on anyone's part because of the many ongoing scams and cheating going around. Before, when you would do a background check on someone, you would probably offend the person. It might still offend him or her but if there is a valid reason to do so and if the person has nothing to hide, he or she would not have to worry about anything about background check on him or her.
You can also do this for finding a missing person. There are now means to find persons, their whereabouts. You need to be careful in finding a person especially if there are some complicated or sensitive reason for your search. It is great that there is now a high technological means of doing these things more effectively.