What do you do when you received someone else packages?

We live on the same apartment complex but that person didn’t put their apt number on there so since my apt number is 1. Someone dropped it off on my door. There’s so many people that live here. I don’t know who this person is. She could be in other buildings. On the package said Lancôme. I think is expensive makeup... show more We live on the same apartment complex but that person didn’t put their apt number on there so since my apt number is 1. Someone dropped it off on my door. There’s so many people that live here. I don’t know who this person is. She could be in other buildings. On the package said Lancôme. I think is expensive makeup idk what to do. Do I go to the post office or walk around and look for her?
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