The answer is yes. If you log in to someone’s Snapchat account on another device it will kick them out of Snapchat on their device. While they may not know the exact person that signed in they will know someone else is using their Snapchat account on another iPhone, Android, iPod or iPad. Before you go and sign into your ex’s Snapchat account recognize that they will be logged out on their phone as soon as you do this.
Over the last two or three years many couples have struggled with the drama that is caused by Snapchat. Boyfriends get jealous because they are not getting private Snaps. Girlfriends get jealous because they are not one of their boyfriend’s best friends. I could go on and on. I can only imagine the drama that is caused when a boyfriend or girlfriend decides to sign in to Snapchat and act as their significant other.
Do you have a story about someone else signing into your Snapchat account? What did they do? Did this cause you to break up with them or call them out of it? Did you ever figure out who it was that was signing in to your Snapchat account?
If you have concerns that someone else has your password I would strongly suggest changing your password as soon as possible. They could act as you can cause many problems in your life in the near future.