A catfish lies about who they are, often going to extreme lengths to continue their lie. They tend to use social networks like Facebook, Instagram and different types of online forums. This is a quick and easy background check. Right-click their photos, copy the URL, and paste in the box at images. Google will then search for other sources of that image online. If nothing is found, try a few photos and see what crops up. Try taking a screenshot jake them on your phone and uploading to Google Image Search. This will work best if you are talking on an app like Tinder or Grindr. See if you can find any credible information about. Everyone should snapchst some sort of indication on their Facebook or Instagram profile that they have a life outside their computer. If no one has posted on their wall to wish them a happy birthday or shared anything with them then this has got to be a cause for concern.