Yes, check with your HR department ASAP. They should have provided you with a notice. Get that notice, it will tell you about the judgment against you. If I recall right, that notice should also tell you the court where this judgment came from. You need to know that they can only sue you where you live, or where the debt was originated. So, if you find that they sued you in a county or state that you did not live in at the time this debt was supposedly originated, and it isnt the county and state you lived in when the case was filed, then you have to contact the clerk of courts office in that court and file an order to show cause/motion to vacate. If what I just said is correct about them suing you in the wrong place, then you will now have multiple grounds for your motion to vacate. Since you were never served a summons, there is improper service. If they sued you in the wrong jurisdiction, then you also have improper venue.