Mistake, inadvertence, surprise, or excusable neglect of the defendant = the person being sued has a real reason they were unable to respond to the lawsuit
Improper venue = the case was filed in the wrong court
Lack of subject matter jurisdiction = the case was filed in a court that does not have proper authority to hear with the case
Lack of personal jurisdiction = the case was filed in a court that does not have proper authority to make decisions regarding the case
Insufficiency of process = the Summons and Complaint documents had technical errors
Insufficiency of service of process = the Summons and Complaint were never properly served to the defendant