Neighbour's kid is having parcels delivered to our address - without asking or knowing us (Wales). Do I need to do anything?

So a couple of weeks ago we had a parcel from Evri, with someone else's name on. Our address, a name we didn't know. They came (and I recognised them as a teenager from up the road) and said Hi, yes we got your parcel, just make sure you put the right address on.

Since then there have been 4 more (in two weeks) which each time I've managed to get sent back as unknown at this address, and notified Evri & RM courier about it. The Evri guy was really nice and said he'd send the message to his depot about it.

Legally - is there something odd that could be going on (other than a young girl hiding purchases from parents?)

If so should I be doing anything?

I don't know her actual address or her parents, I just recognised her face. I can't easily just go knock on and ask if her parents are about & I don't want to start a FB post (as I say, don't know the parents, that could escalate things).