Many employment contracts include a competition clause. By law a competition clause must have been agreed on and laid down in writing with any adult employee. A competition clause means that once the employment contract has terminated employees are, to some extent, restricted in their choice of work. The competition clause indicates which activities cannot be carried out for an agreed period. The introduction of the Dutch Act on Employment and Security (Wwz) reinforced the requirements for competition clauses. We advise and litigate in legal conflicts regarding competition clauses.