You can use the information on the outer packaging of the courier to contact your neighbors, but you need to pay attention to legality and privacy protection.： 1. **Necessity and purpose** If you do take the neighbor's express delivery by mistake, and you cannot contact the other party through other methods (such as knocking on the door, property assistance, etc.), it is reasonable to use the phone number/address on the package. However, **is limited to solving this problem** and should not be recorded or used for other purposes. 2. **Minimize the use of information** Use only the necessary contact information (such as phone number or room number) and avoid recording additional information such as name and full address. When contacting, you can directly explain the situation of the courier taking it by mistake. 3. **Respect privacy** -**Do not disclose information**: Do not disclose your neighbor's personal information to third parties or post it on public platforms. -**Destroy the packaging in time**: If you take the express delivery by mistake, it is recommended to tear or cover the packaging with the information before discarding it. 4. **Legal risk reminder** Unauthorized misuse of other people's personal information (such as for harassment, marketing, etc.) may violate the "Personal Information Protection Law" or local laws and regulations, and must be treated with caution. **Recommended practices**： -Give priority to trying to communicate in person or transit through property/community staff. -If you must contact by phone, delete the number in the communication record after the call. -If the neighbor shows privacy concerns, immediately stop using the information and apologize. Using information legally, in good faith and in moderation can avoid disputes and solve problems at the same time.