I discovered a distant relative in Ireland because he signed up for job alerts with my email address. Fortunately one of them sent the offer that had his resume embedded in it, so I called him and we had a chat, five minutes later I'm speaking to his 81 year old Nan about her grandfather's brother who moved to Australia.

I've also received Amazon gift cards on the US Father's day. I emailed Amazon every time saying it's a mistake and they should refund it, but they refuse to because the recipient isn't allowed to refuse the gift card only the orderer can change the order.