To confirm whether your neighbor is illegally stealing electricity, you need to follow legal and ethical principles, as well as privacy and legal issues. Here are some methods to consider, but please be sure to comply with local laws and regulations: 1. **Observe the meter**: If your neighbor's meter is where you can legally see it, you can pay attention to changes in the meter readings. Under normal circumstances, the meter numbers should rise steadily, and if you notice that the meter readings have not changed, it may indicate that something suspicious is going on. 2. **Pay attention to the use of electrical appliances**: Observe your neighbor's electricity usage habits, such as whether there are any abnormalities when using high-power appliances such as air conditioners and heaters. Frequent and sudden use of high-power appliances may attract attention. 3. **Ask other neighbors**: You can communicate with other neighbors to understand their observations and opinions and see if others have noticed similar situations. 4. **Advice from the power company**: If you have reasonable suspicions, you can report it to the local power company, and they may take necessary measures to investigate. 5. **Avoid direct confrontation**: Do not confront your neighbors directly or conduct secret surveillance, which may not only cause conflicts but also violate privacy. Remember, suspicion does not mean confirmation. Before taking any action, make sure your basis for judgment is reasonable and accurate. The best approach is to deal with these issues through legal channels, such as contacting the relevant authorities to investigate.