What Is an Affidavit of Successor Trustee in California?

In California, the document people call an “affidavit of successor trustee” is almost always one of two things: a certification of trust under Probate Code Section 18100.5, which you present to banks and other institutions to prove your authority, or an affidavit of death of trustee, which you record with the county when the trust owns real estate. Most successor trustees need both. Neither requires a court order, and both can usually be prepared without litigation.

Where Your Authority as Successor Trustee Comes From

The trust document itself is what makes you trustee. If the trust names you as successor and the triggering event has happened (typically the prior trustee’s death, incapacity, or resignation), you have authority to act the moment that event occurs. No judge signs off. What you need is a way to prove that authority to the outside world, because banks, title companies, and county recorders cannot verify it on their own.

California also lets you accept the role formally in writing or simply by beginning to perform trustee duties. If you don’t want it, reject it in writing. Sitting on the question counts against you: if you neither accept nor reject within a reasonable time after learning you’ve been named, the law treats the silence as a rejection.¹ So if you intend to serve, start gathering documents and prepare the certification described below.

Certification of Trust Under Probate Code 18100.5

This is the document that does the heavy lifting. Probate Code Section 18100.5 lets a trustee hand institutions a short, notarized certification instead of the entire trust document, which can run dozens of pages and spell out exactly who inherits what.² The certification proves you are the acting trustee and what you are allowed to do, while keeping the distribution provisions private.

What the Certification Can Confirm

That the trust exists and the date the trust instrument was signed
The identity of the settlor (the person who created the trust) and the currently acting trustee
The trustee’s powers under the trust
Whether the trust is revocable and who holds the power to revoke
If there are multiple trustees, whether all must sign or fewer can act
The trust’s tax identification number
How title to trust assets should be held
The legal description of any real property held in the trust²

The certification must also state that the trust has not been revoked, modified, or amended in any way that would make the certification inaccurate. One point worth emphasizing: the certification does not need to include the trust’s distribution terms. That omission is the whole point of the statute. Beneficiary information stays private; the institution gets what it needs to transact.

Signing and Notarization

Every currently acting trustee must sign the certification, and it has to be an acknowledged declaration, meaning notarized rather than merely signed under oath.² The acknowledgment is what gives institutions confidence to rely on it. California notaries charge $15 per signature acknowledgment.

Why Institutions Accept It

A bank or title company that acts in reliance on a certification of trust, without knowing anything in it is wrong, faces no liability for doing so. The statute lets them accept it at face value without demanding to see the full trust document.² That protection is why most institutions take a properly prepared certification without pushback. Some banks still ask for a copy of the trust itself, particularly for larger accounts, and that is within their rights, but the certification is usually enough.

Third parties who deal with you in good faith are also protected if it later turns out the trust didn’t grant you the exact power you claimed, as long as they had no reason to know.³ The flip side: if you overstate your powers and someone is harmed, the liability lands on you, not the institution that trusted you. Accuracy matters.

Affidavit of Death of Trustee for Real Property

The certification alone does not update land records. If the trust owns real estate and the prior trustee has died, you need to record an affidavit of death of trustee with the county recorder in the county where the property sits. This puts the public record in step with reality: you, not the deceased trustee, now have authority over that property.

What you’ll typically need to record:

A certified copy of the death certificate
A completed Preliminary Change of Ownership Report, filed with the county assessor
The legal description of the property, matching the prior recorded deed exactly
Information identifying the trust, the deceased trustee, and the successor trustee

The certification of trust under Section 18100.5 can also be recorded alongside the affidavit, and it is worth doing when real estate is involved.⁴ Recording the certification creates a public record of your authority that smooths future sales, refinancing, or transfers to beneficiaries. County recording fees vary but generally start around $15 for the first page, with per-page charges after that.

If the trust holds property in more than one California county, record in each county separately. The documents are the same; the filings are not.

The 60-Day Beneficiary Notice

Preparing the certification and recording the affidavit handle the outside world. California also requires you to handle the inside world within a tight deadline. Under Probate Code Section 16061.7, you must send a formal notice to all trust beneficiaries, and to all heirs of a deceased settlor, within 60 days of the event that put you in the role. If you didn’t know a particular beneficiary existed at the time, the 60-day clock starts when you find out about them.⁵

The notification must include:

The settlor’s identity and the date the trust was signed
Your name, address, and phone number as trustee
The address of the trust’s principal place of administration
A statement that the beneficiary can request a complete copy of the trust terms
Any additional information the trust document itself requires⁵

This notice is required whenever a revocable trust becomes irrevocable (usually because the settlor died) and whenever there’s a change of trustee on an already irrevocable trust. If the trust is a charitable trust supervised by the Attorney General, the AG also gets a copy. Missing or delaying this step is one of the most common successor trustee mistakes, and it can hand beneficiaries ammunition for a dispute or a petition to remove you.

A Realistic Sequence for the First Few Weeks

If you’ve just stepped into the role, the paperwork tends to arrive all at once. A workable order:

Locate the trust document and every amendment. You cannot prepare the certification without them. If you cannot find them, the drafting attorney may have copies.
Order several certified copies of the death certificate if the prior trustee has died. Banks, the county recorder, and other institutions will each want their own.
Prepare and notarize a certification of trust under Section 18100.5. This is what most financial institutions will want to see.²
Record an affidavit of death of trustee in each county where the trust holds real property, with the death certificate and a Preliminary Change of Ownership Report.
Send the statutory 60-day notice to beneficiaries and heirs of a deceased settlor.⁵
Contact the financial institutions holding trust assets. Bring the certification of trust, your identification, and the death certificate.

Beyond establishing authority, you also take on fiduciary duties and, often, federal tax filing obligations tied to the trust becoming irrevocable. Those are their own subjects, worth working through with a professional once the authority documents are in place.

1
California Public Law. California Probate Code 15601
2
California Legislative Information. California Probate Code 18100.5
3
California Legislative Information. California Probate Code 18100
4
California Legislative Information. California Probate Code 18100.5
5
California Legislative Information. California Probate Code 16061.7