This question doesn’t have a straight answer as we must first look into the bible for light on the matter.

1Corinthians 6:1-8, Paul spoke strongly against believers taking another believer to court. If two Christians are having issues, the biblical way to go about it, is to meet with the church leaders so that they can help resolve the matter amicably because it is not good for unbelievers to sit as a judge over the matters that concerns brethren. I believe that if the two believers having issues are Spirit-controlled believers, they will allow the wisdom of God to prevail and end it there.

There are situations where you may still have to go court with a fellow believer. In Matthew18:15-17, Jesus made it clear that if you tell a brother his fault and he doesn’t take correction, take two or three witnesses along, if he fails to make amends in the presence of the witnesses then transfer the matter to the church. If the case still remains unresolved, then Jesus commanded that such a fellow be treated as a heathen. I believe lawsuits won’t be a bad idea in such cases especially if it has to do with trampling over your civil rights. In civil matters, I don’t see anything wrong in getting justice. Paul the Apostle defended himself with the law of the land:

Acts22:25, “And as they bound him with thongs, Paul said unto the centurion that stood by, IS IT LAWFUL for you to scourge a man that is a Roman, and UNCONDEMNED? (Referring to not having been tried in a court)”

The statement above shows that in civil matters, Paul knew his right and wouldn’t want anyone to trample on it. God didn’t create us to be dummies, there are laws in the land and it is no crime to file a lawsuit when there is an infringement on your right as long as the motive is pure. Though that shouldn’t be the first thing but rather, a last resort when other actions taken have failed.