ILCS » Chapter 750 · Act 5
Illinois Compiled Statutes

750 ILCS 5/511 (2026)

Procedure

✓ current as of May 2026
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(750 ILCS 5/511) (from Ch. 40, par. 511)
    Sec. 511. Procedure. A judgment of dissolution or of legal separation or of declaration of invalidity of marriage may be enforced or modified by order of court pursuant to petition.
    (a) Any judgment entered within this State may be enforced or modified in the judicial circuit wherein such judgment was entered or last modified by the filing of a petition with notice mailed to the respondent at his last known address, or by the issuance of summons to the respondent. If neither party continues to reside in the county wherein such judgment was entered or last modified, the court on the motion of either party or on its own motion may transfer a post-judgment proceeding, including a proceeding under the Income Withholding for Support Act, to another county or judicial circuit, as appropriate, where either party resides. If the post-judgment proceeding is with respect to maintenance or support, any such transfer shall be to the county or judicial circuit wherein the recipient or proposed recipient of such maintenance or support resides.
    (b) In any post-judgment proceeding to enforce or modify in one judicial circuit the judgment of another judicial circuit of this State, the moving party shall commence the proceeding by filing a petition establishing the judgment and attaching a copy of the judgment as a part of the petition. The parties shall continue to be designated as in the original proceeding. Notice of the filing of the petition shall be mailed to the clerk of the court wherein the judgment was entered and last modified in the same manner as notice is mailed when registering a foreign judgment. Summons shall be served as provided by law.
    (c) In any post-judgment proceeding to enforce or modify the judgment of another state, the moving party shall commence the proceeding by filing a petition to enroll that judgment, attaching a copy thereof as a part of the petition and proceed as provided for in paragraph (b) hereof.
    (d) In any post-judgment proceeding to enforce a judgment or order for payment of maintenance or support, including a proceeding under the Income Withholding for Support Act, where the terms of such judgment or order provide that payments of such maintenance or support are to be made to the clerk of the court and where neither party continues to reside in the county wherein such judgment or order was entered or last modified, the court on the motion of either party or on its own motion may transfer the collection of the maintenance or support to the clerk of the court in another county or judicial circuit, as appropriate, wherein the recipient of the maintenance or support payments resides.
(Source: P.A. 90-673, eff. 1-1-99.)

    
Notes of Decisions
Cited in 26 cases (10 in the last 5 years), 1993–2025 · leading case: In Re Marriage of Gary, 894 N.E.2d 809 (Ill. App. Ct. 2008).
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In Re Marriage of Gary, 894 N.E.2d 809 (Ill. App. Ct. 2008). “Theodore alleged that Sarah had failed to provide notice of the Cook County action to the clerk of the circuit court of McHenry County, as required by section 511 of the Illinois Marriage and Dissolution of Marriage Act (750 ILCS 5/511 (West 2006)), or to Theodore’s attorney.”
In re Marriage of Klose, 2023 IL App (1st) 192253 (Ill. App. Ct. 2023). “Furthermore, Laura’s petition to clarify the judgment states that she sought relief pursuant to sections 2-1401 and 511 (750 ILCS 5/511 (West 2020)), not section 510.”
In Re Marriage of Seffren, 852 N.E.2d 302 (Ill. App. Ct. 2006). “Section 511 of the Act (750 ILCS 5/511 (West 2004)) grants the circuit courts jurisdiction to modify a previously entered judgment of dissolution, so long as a modification petition has been filed.”
In Re Marriage of Sutherland, 622 N.E.2d 105 (Ill. App. Ct. 1993). “Under section 511(a) of the Illinois Marriage and Dissolution of Marriage Act (Marriage Act), a dissolution judgment may be modified by the filing of a petition with notice mailed to the respondent or by the issuance of a summons (750 ILCS 5/511(a) (West 1992)), a procedure…”
In Re Marriage of Fields, 681 N.E.2d 166 (Ill. App. Ct. 1997). “2d at 733 ); the failure to file notice in another state of a petition to change custody pursuant to section 511(c) of the Act (750 ILCS 5/511(c) (West 1994)) is procedural, not jurisdictional ( Bussey, 108 Ill.”
In Re Marriage of Thornton, 867 N.E.2d 102 (Ill. App. Ct. 2007). “” 750 ILCS 5/511 (West 2002). It can thus be seen that any modification or enforcement of the judgment of dissolution entered in the State of Illinois must be initiated by the filing of a petition and notice.”
In re Marriage of Nau, 824 N.E.2d 650 (Ill. App. Ct. 2005). “Citing to section 511 of the Illinois Marriage and Dissolution of Marriage Act (Act) (750 ILCS 5/511 (West 2002)), respondent alleged that in order to modify custody or child support, the trial court must first be presented with a petition requesting such relief.”
Collins v. Dep't of Health & Fam. Servs. ex rel. Paczek, 2014 IL App (2d) 130536 (Ill. App. Ct. 2014). “¶ 28 We do, however, reject petitioner’s argument that, pursuant to section 15(b) of the Illinois Parentage Act of 1984 (the Parentage Act) (750 ILCS 45/15(b) (West 2012)) and section 511 -7- of the Illinois Marriage and Dissolution of Marriage Act (the Marriage Act) (750 ILCS…”
In re Marriage of Murugesh, 2013 IL App (3d) 110228 (Ill. App. Ct. 2013). “en full faith and credit: the Uniform Foreign Money-Judgments Recognition Act (Recognition Act) does not apply to divorce or domestic relations matters (see 735 ILCS 5/12-618(b) (West 2010)),2 and while the Illinois Marriage and Dissolution of Marriage Act allows for enforcement…”
In re Marriage of Hodges, 2018 IL App (5th) 170164 (Ill. App. Ct. 2018). “¶ 13 Respondent then filed an amended petition to determine the arrearage under section 511 of the Illinois Marriage and Dissolution of Marriage Act ( 750 ILCS 5/511 (West 2014) ). Respondent's five-count petition alleged inter alia : (1) the child support agreement was modified…”
Collins v. The Dep't of Health & Human Servs., 2014 IL App (2d) 130536 (Ill. App. Ct. 2014). “¶ 28 We do, however, reject petitioner’s argument that, pursuant to section 15(b) of the Illinois Parentage Act of 1984 (the Parentage Act) (750 ILCS 45/15(b) (West 2012)) and section 511 of the Illinois Marriage and Dissolution of Marriage Act (the Marriage Act) (750 ILCS 5/511…”
In re Marriage of Soman, 2021 IL App (1st) 200513-U (Ill. App. Ct. 2021). “ive jurisdiction pursuant to sections 203 and 206 of the UCCJEA (750 ILCS 36/203, 206 (West 2010)); (2) Andrew incorrectly relied on section 512(c) of the Illinois Marriage and Dissolution of Marriage Act (Act) (750 ILCS 5/512(c) (West 2010)); and (3) Andrew failed to attach the…”
Show all 26 citing cases →
— 750 ILCS 5/511(a) — 2 cases
In Re Marriage of Sutherland, 622 N.E.2d 105 (Ill. App. Ct. 1993). “Under section 511(a) of the Illinois Marriage and Dissolution of Marriage Act (Marriage Act), a dissolution judgment may be modified by the filing of a petition with notice mailed to the respondent or by the issuance of a summons (750 ILCS 5/511(a) (West 1992)), a procedure…”
Weinhaus v. Cohen, 2022 IL App (2d) 210089-U (Ill. App. Ct. 2022).
— 750 ILCS 5/511(b) — 2 cases
John S. v. Shana L., 2020 IL App (3d) 190733-U (Ill. App. Ct. 2020).
In re Marriage of Spirer, 2021 IL App (2d) 200560-U (Ill. App. Ct. 2021).
— 750 ILCS 5/511(c) — 7 cases
In Re Marriage of Fields, 681 N.E.2d 166 (Ill. App. Ct. 1997). “2d at 733 ); the failure to file notice in another state of a petition to change custody pursuant to section 511(c) of the Act (750 ILCS 5/511(c) (West 1994)) is procedural, not jurisdictional ( Bussey, 108 Ill.”
In re Marriage of Murugesh, 2013 IL App (3d) 110228 (Ill. App. Ct. 2013). “en full faith and credit: the Uniform Foreign Money-Judgments Recognition Act (Recognition Act) does not apply to divorce or domestic relations matters (see 735 ILCS 5/12-618(b) (West 2010)),2 and while the Illinois Marriage and Dissolution of Marriage Act allows for enforcement…”
In re Marriage of Soman, 2021 IL App (1st) 200513-U (Ill. App. Ct. 2021). “ive jurisdiction pursuant to sections 203 and 206 of the UCCJEA (750 ILCS 36/203, 206 (West 2010)); (2) Andrew incorrectly relied on section 512(c) of the Illinois Marriage and Dissolution of Marriage Act (Act) (750 ILCS 5/512(c) (West 2010)); and (3) Andrew failed to attach the…”
In re Marriage of Fields, 681 N.E.2d 166 (Ill. App. Ct. 1997).
In re Marriage of Spirer, 2021 IL App (2d) 200560-U (Ill. App. Ct. 2021).
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