Letters of Administration Appointment Requirements in Illinois

At a glance

Requirements one by one

Estate type, court, and county

Illinois issues intestate letters under §§ 9-2 to 9-5. The same § 9-3 priority order governs administration with the will annexed, but that request is added to the will-probate petition under § 6-2.

Section 5-1 uses a three-step county hierarchy. Administration belongs where the decedent had a known Illinois residence. If there was none, it goes where the greater part of Illinois real estate was located; if there was neither Illinois residence nor real estate, it goes where the greater part of Illinois personal estate was located.

Who petitions and what the petition states

Section 9-4 lets anyone desiring intestate letters file. The petition states the decedent's residence and death facts, approximate Illinois real- and personal- estate values, every heir's name and address, minority or disability, and priority status, the nominee's name and address, the petitioner's right to act or nominate, any successor-administration reason, and the § 28-3 personal fiduciary unless supervised administration is requested.

For administration with the will annexed, § 6-2 adds the reason letters are needed, the petitioner's right to act or nominate, the proposed administrator, every prior-or-equal claimant or nominator, and any prior admission date. The will-probate petition also supplies the decedent, will, estate, heir, legatee, executor, and administration-route facts listed in that section.

Priority and nominations

Current § 9-3, effective January 1, 2026, begins with the surviving spouse or the spouse's nominee. It then ranks legatees or their nominees, preferring child legatees; children; grandchildren; parents; brothers and sisters; nearest kindred; and each class's nominees. The final classes are the representative of a deceased ward's estate, the Public Administrator, and a creditor.

Ordinarily only someone qualified as administrator may nominate. A guardian may nominate for a person disqualified solely by minority or legal disability. Within an equal-priority class, the court may appoint one or more claimants or one or more of their nominees and must name each coadministrator in the letters.

Qualification and U.S. residence

Section 9-1 requires an individual administrator to be at least eighteen, a resident of the United States, of sound mind, not adjudged a person with a disability under the Act, and without a felony conviction. It does not require Illinois residence. Under § 12-1, a corporation qualified to administer trusts in Illinois may serve by filing an acceptance of office.

Notice, hearing, waiver, and replacement letters

At least thirty days before the hearing, § 9-5 requires the petitioner to mail the petition with the hearing time and place to every named, addressed person who may administer or nominate equally with or ahead of the petitioner.

Within fourteen days after the order directing original letters, the administrator mails the petition and order to each other heir. If an heir's name or address is missing, notice is published once a week for three successive weeks, with the first publication within the same fourteen-day period. An adult person not under disability who appeared at the hearing or files a waiver does not need the statutory copies or publication.

Section 9-7 protects an omitted prior-or-equal claimant. Within three months after letters issue, that person may seek letters for self or a nominee, give the existing administrator ten days' hearing notice, and ask the court to revoke and replace the letters.

Oath, surety, bond amount, and office

Under §§ 12-1 to 12-3, a qualified corporate representative files an acceptance and is exempt from the Act's ordinary bonds. An individual files the faithful- performance oath and a court-approved bond before undertaking the office. The bond uses at least two court-acceptable individual sureties or one qualified, court-acceptable surety company.

Section 12-5 ordinarily sets bond at not less than twice the personal-estate value with individual sureties—or when written security is excused—and one and one-half times that value with a surety company. Possession of real estate adds the court-set amount based on income, and litigation proceeds have their own supplemental calculation. A will may excuse written security for an administrator with the will annexed under § 12-2, subject to the Act's continuing bond and court-control rules.

What trips people up

Illinois splits notice around the appointment order. Prior-or-equal claimants receive the petition at least thirty days before the hearing; other heirs receive the petition and order within fourteen days afterward, with publication for missing names or addresses.

Omitting a priority claimant can reopen the appointment. Section 9-7 gives that person a three-month path to request replacement letters, so post-order finality cannot be assumed from the first grant alone.

Common questions

Must the administrator live in Illinois?

No. Section 9-1 requires residence in the United States, not Illinois, along with its age, capacity, disability, and felony conditions.

Can a priority holder nominate someone else?

Yes. Section 9-3 expressly gives nomination rights to the spouse, legatees, children, grandchildren, parents, siblings, and nearest kindred, subject to the nominee and nominator qualification rules.

Can two equal-priority people serve together?

Yes. Section 9-3 lets the court issue letters to one or more equally entitled claimants or nominees, and the letters must identify each coadministrator.

Statutes and sources

• 755 ILCS 5/5-1 (accessed 2026-08-09).
• 755 ILCS 5/6-2 (accessed 2026-08-09).
• 755 ILCS 5/9-1 (accessed 2026-08-09).
• 755 ILCS 5/9-2 (accessed 2026-08-09).
• 755 ILCS 5/9-3 (accessed 2026-08-09).
• 755 ILCS 5/9-4 (accessed 2026-08-09).
• 755 ILCS 5/9-5 (accessed 2026-08-09).
• 755 ILCS 5/9-7 (accessed 2026-08-09).
• 755 ILCS 5/12-1 (accessed 2026-08-09).
• 755 ILCS 5/12-2 (accessed 2026-08-09).
• 755 ILCS 5/12-3 (accessed 2026-08-09).
• 755 ILCS 5/12-5 (accessed 2026-08-09).