How do I trust a data entry freelancer with sensitive information?

[Btaliat]

In a situation where the clients need to make use of freelancers when there is sensitive information, such a client needs to be careful. You need to make sure that you are making use of trustworthy freelancers. Not only that, have some documents, I mean legal documents, like Non-disclosure acts signed. There should be open communication and agreement on what such a freelancer should do and not to do. All these must be addressed before they start the process. What do you think about this?