If you receive a call and immediately hear the phrase ‘Can you hear me?’ hang up. The phrase is used to coax you into saying ‘yes,’ a word that, if said in your voice, is as good as gold for con artists.

The person on the other end will be recording the call, and can now use the track of you saying ‘yes’ to access your sensitive information. But how? you may ask. The three letter word is used frequently by companies to confirm account changes, security settings, and purchases, and now this sordid sort has extensive access to your stuff. (Here are five tips that will help you keep your cell safe from hackers.)

To avoid these nefarious calls, be wary of unknown or unrecognizable numbers, always keep your personal information private, and don’t be afraid to question the legitimacy of the caller.  Although countering back with ‘Can YOU hear me now?’ may seem like the ideal way to really stick it to the scammer, it’s probably best to resist that urge.