People are often required to let someone from outside gain limited access into your family, which is risky, they have to make every effort to locate someone with good recommendations from people that you know and trust. This will help you know for sure that someone is good and can be trusted The importance of having someone you trust as a coach can be critical when you are looking for someone to help your family and kids with sports, for sure you dont want someone who isnt known to you as it is too risky. Often however you will need to hire someone who isnt personally recommended to you, but before you do run simple checks on the candidates before hiring them such as reverse phone lookup which can help you check someone is who they say they are. Also run a google search, someone else may have an opinion on them and have recorded it online somewhere.