What does the Petition for Declaration of Invalidity of Marriage do?

It asks the circuit court to declare a marriage invalid and allows the petitioner to request use of a former name. The form asks for the marriage details and the basis for the request.

Who can file this marriage invalidity petition?

A spouse seeking a court declaration that their marriage is invalid can use the petition to describe the marriage and provide facts supporting one of the grounds listed on the form.

Do I need a notary for the Petition for Declaration of Invalidity of Marriage?

No. This document is signed without a notary, and it does not mention a notarized or sworn attachment; the signer just signs and dates it.

St. Clair County, IL · St. Clair County

No notary required

Petition for Declaration of Invalidity of Marriage

This petition asks the circuit court to declare a marriage invalid; a spouse files it with details about the marriage and the reason for the request.

At a glance

Issued by: City of St. Clair County · St. Clair County, St. Clair County, Illinois
Notarization: Not required: file this form without a notary.
Official source: co.st-clair.il.us
Blank form: Download the PDF
Catalogued: Oct 5, 2026
Machine-readable: JSON record · about the forms index

What this form is

A spouse uses this petition to ask the circuit court to declare a marriage invalid and may also request to use a former name. The form asks about where and when the parties married, their separation, and the facts supporting one of the listed grounds: inability to consummate, fraud, underage marriage, an existing marriage, or inability to consent.

Who needs it

A spouse seeking a court declaration that their marriage is invalid can use this petition to state the relevant facts and basis for the request.

How to submit it

Submit it to the county office named on the form; check the county website for current contact details.

About notarization

This document is signed without a notary; no notarized or sworn attachment is mentioned, so the signer just signs and dates it.

How to submit this form

1
Download the Petition
Download the Petition for Declaration of Invalidity of Marriage PDF.
2
Complete the Petition
Enter the requested marriage details and complete the section for the ground supporting your request.
3
Review Your Information
Check the completed petition for the requested facts about the parties, marriage, separation, and applicable ground.
4
Submit to the County
Submit it to the county office named on the form; check the county website for current contact details.

Frequently asked questions

What does the Petition for Declaration of Invalidity of Marriage do?: It asks the circuit court to declare a marriage invalid and allows the petitioner to request use of a former name. The form asks for the marriage details and the basis for the request.
Who can file this marriage invalidity petition?: A spouse seeking a court declaration that their marriage is invalid can use the petition to describe the marriage and provide facts supporting one of the grounds listed on the form.
Do I need a notary for the Petition for Declaration of Invalidity of Marriage?: No. This document is signed without a notary, and it does not mention a notarized or sworn attachment; the signer just signs and dates it.
How do I submit the Petition for Declaration of Invalidity of Marriage?: Submit it to the county office named on the form; check the county website for current contact details.

Need something notarized?

This Petition for Declaration of Invalidity of Marriage doesn’t need a notary, but Illinois residents can notarize other documents online with a commissioned online notary.