So if I understand this right, they are creating a fake account on some other site (aliexpress, etc...) with his address attached. And then they ship the 'gift' from the Amazon tracking number, so that he is more likely to accept that package, and then ship the multimeter from the fake account tracking number, allowing them to leave themselves a positive review on that site.

I always suspected something was going on with the aliexpress ratings. If you look at the reviews it is a lot of one liners like 'i got the item as described!' with a 5 star rating.