765 ILCS 5/29

Where an original deed, mortgage or other instrument relating to or affecting the title to real estate, having tracts of land therein described lying in different counties, has been or may hereafter be recorded in any of such counties, it shall be lawful to record a certified copy of such deed or other instrument in counties where the original has not been recorded; and the recording of such certified copy heretofore or hereafter shall be notice in the same manner that the filing and the recording of the original would be, and copies from such records shall be prima facie evidence to the same extent as if the original had been so recorded.