8. Online Reviews & Check-ins
Technology today has connected us in such ways that it’s so easy to keep track of a person. Follow their footprint online closely so that you can see if they ever check-in somewhere or may leave reviews somewhere for a restaurant or a hotel or some sort of service that they’ve been using. It’s likely that they are going to be careful about it, but someone else might check-in and tag them so be on constant lookout online. And when you do find something, make a note of taking a screenshot to make easy for you to catch a cheating partner.