Legal Question in Wills and Trusts in Illinois

You will need to provide more background to have this question answered. At a minimum, what is the check for, who is the decedent, is there a surviving spouse, any siblings that have passed, any outstanding bills of the decedent. The answers may lead to more follow up questions. It would be best you call a qualified probate attorney.

Presumably equally, but not necessarily. However, as a practical matter to cash a check made payable to joint payees, the bank needs all payees to endorse the check. There must be an agreement among the payees as to who gets what.