Blank white paper being taped to door

About a month ago, a man pulled into my driveway just after 8 pm, got out of his car and taped a piece of blank white paper to my door, then left. It was odd and bizarre. Fast forward to yesterday, the same man showed back up in the middle of the day (mind you, there were 3 cars at my house and multiple people home). Came up to the door, taped blank white paper again, then took a photo of it, and left. Curious if anyone knows if this means something, or if this could just be a disturbed person (either way I don’t like it). We clearly have multiple cameras but he did not try to hide his identity. No idea who he is though.