Although the use of the contact information on the outer packaging of the courier seems to be a direct way to solve the problem of mis-delivery of the courier, out of respect for privacy, I suggest the following methods to deal with it.： 1. Give priority to trying to hand over the express delivery to the community property or doorman, and let them assist in the transfer 2. If you know which unit your neighbor lives in, you can knock on the door and return it directly. 3. If it is indeed impossible to contact the neighbor through the above methods, it is understandable to temporarily use the phone number on the package to contact once. Please remember that even if you have good intentions, unauthorized use of other people's personal information may still cause discomfort to the other party. The relevant information should be deleted immediately after contact and should not be stored or used for other purposes. People want their personal information to be respected and protected, and it is important to maintain respect for the privacy of others when dealing with such situations.