In this article, our Cook County will contest attorneys explain what a will contest and how will litigation works. A will contest is filed by an interested party seeking to invalidate a will based on allegations that the will was improperly executed based on fraud, undue influence, without the requisite mental capacity, or as a result of some other impropriety. We explain the deadlines to file a will contest, who may file a will contests, and the impact of no-contest clauses in wills.