Legal Question in Wills and Trusts in Illinois

I suggest that you hire a lawyer in your jurisdiction to handle the matter. It doesn't matter how many of the "heirs" have signed off on the "Will", there will still have to be a hearing in front of the Judge and testimony taken to authenticate the copy. Since you can't find the original, there will always be a question of whether the old Will was revoked, i.e., torn up, by the decedent before their death.

In order to probate a will, or to administer an intestate estate without a will, court action is needed. What the court requires is for the court to determine. The named executor, or some other party, needs to initiate a probate case and follow the instructions of the judge assigned to the case. Best done with the help of an Illinois attorney.