Literally just did this.Hmmm. At a business or resi? Employees at my pickups toss an RS into the pile often enough; the return address will be their residence (not the business where I'm picking it up). I never think twice about picking those up. If it was at a resi, and didn't have a note "UPS please pick up" or there was no OCA I'd make contact before I took it. If no answer I'd even write a note inquiring about the pkg: "Is that pkg with an outbound label for me to pick up? If so, please leave a note next time."
Had a call tag, and the package left on the porch had a fedex delivery label. Looked like it had been retaped, so I’m pretty sure it was the pickup, but they weren’t home to verify. Left an info notice asking them if it was outbound, and that I’d swing back by tomorrow.