Quick answer: the most common mistake is never recording a new deed into the trust's name for real estate. It's still the family's own responsibility, and skipping it means that property goes through full Oregon probate regardless of the trust. See how the numbers change in the Oregon probate vs living trust calculator.
Signing ≠ funding
1. Real estate deed never recorded — the #1 mistake
Moving real estate into a trust requires a new deed, signed, notarized, and recorded with the county clerk, naming the trust as owner. This is the step most often skipped. Left undone, that property remains a probate asset — subject to the ORS 116.173 sliding-scale commission and the 4-month-minimum creditor claim period, regardless of the trust document sitting unused.
2. Financial accounts left titled individually
Bank and brokerage accounts don't join a trust automatically. Each one has to be retitled into the trust's name, or the institution needs a copy of the trust document plus a change-of-ownership form. Accounts opened after the trust was created are especially easy to forget.
3. Assets acquired after the trust was created
A trust only holds what's actually been transferred into it. A car, account, or property acquired afterward stays outside the trust unless someone deliberately adds it — which is why periodic review matters as much as the initial funding.
4. A basic trust when a bypass trust was needed
This isn't strictly a funding mistake, but it has a similar effect for a married couple near or above $1 million combined: a fully signed and fully funded basic revocable trust still doesn't preserve both spouses' Oregon estate-tax exemptions, since the exemption isn't portable. Only a bypass (credit-shelter) trust, structured for that purpose, actually solves it.
5. Treating the Small Estate Affidavit as a safety net
Oregon's Small Estate Affidavit — $275,000 total, capped at $200,000 real property and $75,000 personal property — is a genuine shortcut for modest, unfunded assets. It is not a backstop for a house or a sizeable account left outside the trust by mistake; those amounts sit well above the threshold and require full probate regardless of the unused trust document.
A local probate attorney can review your estate — many offer a free consultation.