Had a credit card over 10 years ago, I was laid off...a few times and couldn't pay.  The account went into collections, & was eventually charged off.   Now a debt collector called and left a message on my phone about it.  I've looked on line and saw that the statute of limitations in michigan is 6 years.  I'm well past that.   One site said if I talk to the collector, that I should just tell them that "the statute of limitations has run on this debt, do not contact me again."   But, my question is How do I prove that it's been over 6 years?