Who confirms that the package was returned?

Both sides take part in closing the return. The finder taps Mark handed off after giving the package to the recipient or leaving it at the agreed pickup spot. Handback then asks the recipient to confirm.

The recipient taps I picked it up only after the package is in their possession. The recipient’s confirmation completes the case and notifies the finder.

If the finder already marked it handed off but you do not have the package, do not confirm. Recheck the agreed spot and notes, then use Report a problem if something is wrong.