When can you sue and not sue a person?

You can sue a person when you have a legal claim, such as breach of contract, personal injury, or property damage, and you can demonstrate that the other party is legally responsible for the harm caused. Conversely, you cannot sue someone if the claim is barred by legal protections, such as immunity (e.g., government officials in certain contexts), if it is outside the statute of limitations, or if there is no legal basis for the claim. Additionally, some disputes may be required to go through arbitration or mediation instead of court. Always consult a legal professional for specific situations.