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Form MC 306, Substitution of Attorney, page 1
Basic · 36/100Form Complexity Index

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What this form asks for

The AI fills all of it, from your answers or your documents.

Form MC 306 is a legal document used in Michigan courts to officially notify the court and all involved parties of a change in legal representation. It formalizes the process of a client replacing their current attorney with a new one, requiring signatures from the client and the new attorney to be valid. Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields33
Pages1
Form Complexity IndexBasic, 36/100

The AI checks your answers before you download

12 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Case Number Presence and Format

This check verifies that the 'Case no.' field is not empty and conforms to the standard format for Michigan court cases. The case number is the primary identifier for the legal proceeding, and its absence or incorrect format would make it impossible to file the document correctly. If this validation fails, the system should flag the form for manual review to identify the correct case.

Attorney Bar Number Validation

This validation ensures that the 'Bar no.' for both the incoming and withdrawing attorneys is present and follows the Michigan State Bar format (a 'P' followed by a series of digits, e.g., P12345). This is a critical check to verify that the individuals are licensed attorneys in good standing, which is a legal requirement for representation. A failed validation could indicate an unauthorized person is attempting to practice law.

Client Name Consistency Across Fields

This check cross-references the client's name across three locations: the case caption (Plaintiff/Petitioner or Defendant/Respondent), the 'on behalf of' line, and the printed name next to the 'Client's signature'. All three names must match to confirm that the person consenting to the substitution is the actual party to the case. A mismatch could invalidate the substitution and indicates a potential clerical error or misunderstanding.

Withdrawing Attorney Name Consistency

This validation confirms that the name of the attorney listed in the 'I replace attorney...' sentence matches the printed name next to the 'Withdrawing attorney's signature'. This ensures the attorney being replaced is the same one who is signing off on the substitution. Failure to match could lead to confusion and legal challenges regarding which attorney was officially withdrawn.

Completeness of Required Signatures

This check verifies the presence of all three required signatures: the new attorney, the client, and the withdrawing attorney. The consent of all three parties is legally necessary to execute the substitution of attorney. An incomplete form lacking any of these signatures is legally deficient and will be rejected by the court clerk.

Valid Date Format for All Date Fields

This validation ensures that all date fields on the form, including signature dates and the hearing date, are entered in a recognizable and valid format (e.g., MM/DD/YYYY). This prevents data ambiguity and ensures an accurate record of when events occurred. An invalid date format would cause processing errors and require manual correction.

And 6 more checks
  • Logical Hearing Date
  • Party Identification Completeness
  • New Attorney Contact Information Completeness
  • Court Identifier Presence
  • Standard Telephone Number Format
  • Notice Recipient Information Presence

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How to Fill Out MC 306 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the Michigan Substitution of Attorney form (MC 306).
  2. Provide the case information when prompted by the AI, including the court, case number, and judge's name.
  3. Enter the full names and addresses for the plaintiff, defendant, and other parties involved in the case.
  4. Identify the client, the new incoming attorney, and the withdrawing attorney, filling in their respective details such as name, bar number, and firm address.
  5. Review all the information auto-filled by the AI for accuracy, ensuring all required fields are complete.
  6. Electronically sign the document in the designated areas for the client and the new attorney, and add the date.
  7. Download the completed Form MC 306, ready for filing with the court and distribution to all parties.

Common Mistakes in Completing MC 306

The ones the AI is built to catch.

Incorrect Court Jurisdiction Details
People often get confused between the Judicial District, Judicial Circuit, and County Probate fields, filling in the wrong one or leaving them blank. This error can cause the form to be rejected or filed in the wrong court, leading to significant delays and potential dismissal. To avoid this, carefully check the original case documents for the correct court information before completing this section.
Inaccurate Case Number or Judge Name
The case number is the primary identifier for the legal action, and even a single-digit error can lead to the document being misfiled or rejected. Similarly, omitting or misspelling the assigned judge's name can cause processing delays. Always double-check the case number against official court notices. Using an AI form-filling tool like Instafill.ai can help prevent typos by saving and auto-populating recurring case information accurately.
Failure to Notify All Required Parties
The form requires listing the Clerk of the Court and all attorneys of record and unrepresented parties. A common oversight is forgetting to list an opposing counsel or a co-defendant, which constitutes improper notice. This can lead to the substitution being invalidated and may require refiling and re-serving the document, wasting time and resources.
Missing Required Signatures
This form requires up to three signatures: the new attorney, the client, and the withdrawing attorney. Forgetting any of these signatures, especially the client's consent, will render the substitution invalid. This often happens due to poor coordination and results in the court rejecting the filing until a fully executed form is submitted.
Incorrect or Missing Attorney Bar Number
The attorney's bar number is a unique identifier required by the court for verification. Entering an incorrect number, or omitting it entirely, is a frequent data entry error that can lead to rejection of the filing. AI-powered tools like Instafill.ai can store this information securely and populate it correctly every time, eliminating the risk of manual entry errors.
Ambiguous Client Identification
In the phrase 'I replace attorney... on behalf of...', the name of the client must be clearly and fully stated as it appears in the case caption (e.g., 'John Doe, Plaintiff'). Vague entries like 'the defendant' or using a nickname can create ambiguity. This can confuse the court clerk and opposing parties, potentially delaying the processing of the substitution.
Writing in the 'Ex Parte Order' Section
The section labeled 'EX PARTE ORDER' is reserved exclusively for the judge's signature and date. Filers sometimes mistakenly write or sign in this box, which will cause the form to be immediately rejected by the court clerk. This area must be left completely blank for the court to complete.
Using an Outdated Form Version
The provided form is marked 'Rev. 3/15,' indicating it's from 2015. Courts frequently update their forms to reflect changes in rules or laws, and submitting an obsolete version can lead to automatic rejection. Always check the official court website for the most current version of any legal form before filling it out.
Illegible Information on a Non-Fillable Form
Many court forms are distributed as non-fillable PDFs, forcing users to print and fill them out by hand. Illegible handwriting, especially for critical information like case numbers and names, is a primary reason for rejection. If you encounter a non-fillable PDF, tools like Instafill.ai can convert it into a fillable version, allowing you to type information clearly and avoid legibility issues.
Incorrect Next Scheduled Hearing Date
The form asks for the date of the next scheduled hearing, which is crucial for all parties. People may leave this blank, guess the date, or enter an old date, causing confusion and potentially leading to missed court appearances. It is essential to verify the next hearing date from the court's official docket before filling out this field.

Frequently Asked Questions About MC 306

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 10 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your MC 306.
Can I fill other forms too?
This plan is for your MC 306: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
How do I cancel?
From your account, in two clicks, any time. No email, no call.
How does the AI fill out MC 306?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of MC 306, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is MC 306 to fill out?
MC 306 has a Form Complexity Index of 36 out of 100, in the basic tier: 33 fillable fields across 1 page. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of the Substitution of Attorney form (MC 306)?
This form is used in Michigan courts to formally notify the court and all involved parties that a client is changing their legal representation from one attorney to another in an ongoing case.
Who needs to fill out and sign this form?
The form must be completed and signed by three parties: the client who is changing lawyers, the new attorney who is taking over the case, and the previous attorney who is withdrawing.
What information do I need to have ready to complete this form?
You will need the case number, the court's name and address, and the full contact information for yourself, the opposing party, your old attorney, and your new attorney, including their bar numbers.
What do I do with the form after everyone has signed it?
After it is fully signed, the original form must be filed with the Clerk of the Court. You must also distribute copies to all other attorneys and any unrepresented parties in the case.
Why does a judge need to sign this form?
The judge's signature on the 'EX PARTE ORDER' section officially approves the change in legal representation. This makes the substitution legally effective and updates the court's official record.
What happens if my old attorney refuses to sign the substitution form?
This form is intended for when all parties agree to the change. If your withdrawing attorney will not sign, your new attorney will likely need to file a formal motion with the court to request the substitution.
Can I use this form to fire my attorney and represent myself?
No, this form is specifically for substituting one attorney with a new one. To represent yourself (pro se), your attorney would typically need to file a 'Motion to Withdraw as Attorney,' which is a different process.
Where can I find my case number and the court information?
Your case number, judicial district/circuit, and court address can be found on any previous documents filed for your case, like the initial complaint or summons. If you can't find them, contact the clerk's office for the court handling your case.
Who should I list in the 'NOTICE' section?
In the 'TO:' field, you must list the names and addresses of the Clerk of the Court, all attorneys representing other parties in the case, and any individuals who are parties to the case but do not have an attorney.
Can AI tools help me fill out the Substitution of Attorney form?
Yes, services like Instafill.ai use AI to help you accurately auto-fill form fields with your saved information, which saves time and reduces the chance of errors.
How can I use Instafill.ai to fill this form online?
Simply upload the MC 306 PDF to the Instafill.ai platform. The service will make the form fillable online, allowing you to click and populate the fields with your case details and contact information before printing.
The PDF form I downloaded isn't fillable. What can I do?
You can use a tool like Instafill.ai, which can convert flat, non-fillable PDFs into interactive forms. This allows you to easily type your information into the correct fields directly on your computer.
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Other forms like this one

Michigan court forms: Form MC 03, Answer, Civil, Form MC 02, Appearance, Form MC 6, Notice to Appear, Form MC 01, Summons, State of Michigan, Form MC 01a, Complaint, Form MC 01b, Motion for Second Summons and Order, State of Michigan Blank Court Form, Form MC 07, Default Request and Entry, Form MC 07a, Default Request, Entry, and Judgment (Sum Certain), Form MC 09, Dismissal, Form MC 09a, Dismissal, Nonservice/No Progress, Form MC 10, Judgment, Civil, Form MC 11, Subpoena, Order to Appear and/or Produce, Request and Writ for Garnishment (Periodic), Form MC 13, Request and Writ for Garnishment (Nonperiodic), Form MC 14, Garnishee Disclosure, Form MC 15, Motion and Affidavit for Installment Payments/To Amend Order for Installment Payments, Form MC 15a, Order Regarding Installment Payments, Form MC 16, Motion to Set Aside Order for Installment Payments, State of Michigan, Form MC 16a, Order on Motion to Set Aside Order for Installment Payments

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