Below are the forms that must be completed to start an estate proceeding informally in Oakland County Probate Court. (b) A petition to set aside a will's informal probate or to prevent a will's informal probate that is the subject of a pending application.A schedule for the distribution of all remaining assets of the estate is filed and served with this petition. 11. No Michigan estate or inheritance tax is due. To start this process, file a Petition for Assignment with the probate court in the county where the decedent lived. There are different ways to approach the estate administration process. These proceedings may be formal or informal, supervised or unsupervised. The first step is to file the "Petition to Set Aside without Administration" with your local probate court. Note: the court will check for any wills on file. ___ Respondent was not provided with proper service of process pursuant to law.