It would be a good idea to freeze your credit with each reporting agency. Monitoring unusual behavior, in and of itself, is not enough in this situation. It is far better to protect yourself, than make blind assumptions.Yes. I ordered my cousin a MacBook Pro for Christmas and had it sent to me first so I could wrap it. Somewhat ironically, it got lost in the mail. It was never found, and Apple sent me a replacement.
At this point, I honestly think the most likely explanation is that some random couple or whoever ordered them from a carrier and some employee or software along the way made a mistake and sent them to me.
Legally speaking, you can keep the merchandise. From a moral standpoint, you should return them because it is the right thing to do.
What if this is just a mistake on someone's part and ultimately, they will have to have money taken out of their check or worse, get fired, because you kept the watches? What if you were that person?