I assume you have already associated your Raptor with your Ford account. Originally when you send the request, you have to be in the truck and accept it from in the truck's sync.
If you want to give access to your truck to your “other person” and provide the ability to lock/unlock/remote start, they send the request and you have to approve access from your account. This is done by entering the VIN of the truck they want to access and associate with.
SOOOOO either it was a mistake by a person entering the wrong VIN or somebody was next to your truck trying to “trick you” into allowing access so mischief can occur before you may realize it was a mistake.