Several years ago our mortgage was sold and when the information was exchanged between the XXXX companies my social security number was written wrong by XXXX digit. I did n't find out until years later and in that time all of the reporting agencies changed my number. I do not feel this is my error and there should be record of a number variation in each of their systems. Why do I have to prove who I am when they are the ones who changed the reporting information and what happened to my social security number whose name is now assigned to it that it would n't recognize both of them.