Do you think some employees may be taking advantage of your paid leave plan? If so, it’s OK to set up a surveillance program to catch the worst offenders. Just make sure you document why a particular employee’s behavior is suspicious. Good reasons to check up include “coincidental” timing like absences clustered around weekends or holidays.

Complaining about things like pay disparities and other alleged acts of discrimination doesn’t make an employee immune from discipline. But if the timing between the complaint and the discipline is too close, watch out for a retaliation lawsuit. Make sure that doesn’t happen by setting up a process in which disciplinary recommendations are based on an independent investigation.

Managers may be reluctant to report potential employee theft to the police, assuming that if they are wrong, they could be sued. But chances are that, if an employer acts in good faith, it won’t be liable—even if it turns out the employee is innocent.

You no doubt take sexual harassment complaints seriously and promptly try to learn the facts. But which facts should you consider when deciding whether the conduct creates a hostile work environment? Look at the totality of the circumstances. For example, comments that aren’t directly sexual can still contribute to a hostile environment if the context indicates that the comments are related to others that are sexual.

Employers that act fast when an employee complains about any form of harassment can almost always salvage what would otherwise be a very bad situation. The key is prompt investigation—followed by equally fast and decisive action if it turns out the complaint has merit.

If you carefully document disciplinary actions and punish all employees fairly, courts will usually uphold your decisions. That’s because an employee who challenges the reason for her discharge has to show that the reason wasn’t legitimate—that, rather, the rationale was merely a pretext for some form of discrimination. And it takes more than just coincidence to do that.