You have been appointed and qualified as personal representative of the estate on . INSTRUCTIONS: Use this form to authorize the Michigan Department of Treasury to communicate with a named individual or entity acting on your behalf.RE: Letter of Authorization. Edit, sign, and share michigan letters authority online. No need to install software, just go to DocHub, and sign up instantly and for free. Follow the structured sections carefully, noting any requirements outlined. The spaces require you to fill in the pertinent information. Mention what actions the authorized person is allowed to take on your behalf. For example, you could write "payment information". Authorisation Letter to Collect Documents: Format and Sample Letters.