The Montana Department of Revenue runs the state's unclaimed property programme, and its portal explains it in plain terms: unclaimed property is money or items left with a bank or a company without being moved or checked on for a long time, and the examples run to bank accounts, wage and payroll checks, gift cards, stocks and bonds, refunds, insurance payments, dividends and safe deposit box contents. The route is set out in five steps. Businesses review their records every year for money sitting with them without owner activity, and try to find the owner by writing to the last known address. The funds then stay with the business for the dormancy period, giving the owner a chance to come forward. Where the owner is still missing when that period ends, the business files a report and remits the property. The department holds it in safekeeping until the owner or the heirs can be located. And the owner claims it by searching the state's tax portal and submitting a claim.
Over $111,010,528 has gone back to Montanans. The department's holder guide defines the trigger as no activity or owner contact for one year or longer, and the property types it lists are wide: uncashed checks, savings and checking accounts, payroll including bonuses and commissions, utility security deposits, credit balances, money orders, customer deposits, traveller's checks, stocks and bonds with their uncashed dividends and interest checks, insurance proceeds, trust distributions, mineral royalty payments, certificates of deposit and other intangible interests, together with the tangible contents of a safe deposit box. The unclaimed property team answers on (406) 444-6900. For Montana records held locally, see the Montana county pages.
- Auto Pay: under House Bill 88 the department matches property to owners from tax records and mails checks of up to $1,000 with no claim filed.
- Two letters: an auto pay letter means a check is coming and no claim should be filed, while a claim letter asks the owner to complete a form for a refund.
- Auctions: the department runs a live online auction of abandoned property under section 70-9-812 of the Montana Code.
- Mineral trusts: where a royalty owner cannot be found a court appoints a trustee, and when the department holds the fund the claimant gets half the interest earned.
Written by SearchSystems.net from Montana's own systems: the Montana unclaimed property portal, the department's unclaimed property reporting page, the department's unclaimed property holders guide, each read on October 14, 2026 by the SearchSystems editorial team.
The two letters, and which one needs an answer
Montana sends two different letters, and confusing them wastes time or money. The first follows the Montana Auto Pay Program, created when House Bill 88 passed in the 2025 legislative session, which allows the department to auto match unclaimed property to the rightful owner using tax records and mail a check without any claim being filed. The department's instruction to recipients is unambiguous: do not file a claim for these funds.
The programme is capped, paying automatically up to $1,000, and the department asks everyone to search anyway for the additional properties it cannot pay that way. Anyone with a question about such a letter can email or telephone the unclaimed property team quoting the claim identifier printed on it. The second letter is headed as a claim for unclaimed property and comes from the same matching exercise, comparing departmental tax records against unclaimed property records, but here the owner must act: the notice carries instructions on its first page, and completing and returning the form brings the money back as a refund from the department. In short, one letter means wait, the other means fill it in.
Searching and claiming
Everything the automatic programme does not cover runs through the state's transaction portal, where a searcher looks for property and submits a claim. The department describes its own role as keeping the property safe until the owner is ready to claim it, and it holds the property for the heirs as well as the owner. Alongside the portal it publishes a short video explaining the programme, and it runs a live online auction for the public sale of abandoned property under section 70-9-812(1) of the Montana Code, which is where tangible items that nobody has claimed are sold.
Mineral trusts, and the half share of interest
Montana administers a category that most states leave entirely to the courts. An unlocatable mineral trust is created when the owner of a leasehold, mineral or royalty interest cannot be found, and a court may name a trustee to manage and invest the funds until they are claimed. Normally the court appoints the county clerk of court as trustee, and where the clerk declines the Department of Revenue is named instead. The detail that matters to an heir is what happens to the earnings: where the department manages a fund, claimants receive 50 percent of the interest earned on its investments.
The department maintains a summary spreadsheet of the trusts it administers, and claiming one begins with filing a notice of address. For a family that has inherited an interest in a producing property but lost touch with the operator, that spreadsheet is the first place to look, because the money may be sitting in a trust rather than in the ordinary unclaimed property database.
What holders must do
The reporting page and the holders guide set the rules out together. Any entity doing business in Montana or with Montanans must report, which covers banks, credit unions, utilities, wholesalers, retailers, manufacturers, government entities, insurance companies, public corporations, public authorities, estates and trusts, and an out of state holder must report where the owner's last known address is in Montana. Before anything is remitted, an owner due $50 or more must get a due diligence letter to the last known or any newer address, setting out the amount and asking for positive confirmation.
There is no minimum reportable amount, although amounts under $50 for a single owner may be reported in aggregate by property type, with detail encouraged wherever it exists. Negative reports are not required in Montana, and a holder that chooses not to file one should simply keep the records. Reports are due on November 1 using a June 30 cut off for all holders except life insurance companies, which file by May 1 using a December 31 cut off.
Records must be kept for ten years after the property was reportable, including the owner's last known address even where post was returned, because that is what helps a claimant confirm ownership later. One instruction saves holders effort: after filing electronically, send nothing on paper and obtain no notarisation, because no paper documents are needed and any that arrive are destroyed. Montana also has reciprocal agreements with every other state, and once a year it forwards property information to the state of the owner's last known address.
Boxes, shares and errors
Safe deposit box contents are not sent with the report. Everything found in a box goes to the department in Helena 60 days after the report due date, addressed to the unclaimed property division at the third floor reception. Securities have their own instructions, which the department updated with immediate effect: worthless, nontransferable and restricted securities should not be reported at all, a report is not complete until the holder provides evidence that the property has been transferred into the state's ownership, and an intent to deliver must reach both the department's custodian and its securities mailbox five days before any delivery.
Where a holder discovers a mistake on a report, the department asks to be emailed rather than sent a correction, and it fixes the record. The information each report must carry includes every owner's name, meaning anyone with a legal or equitable interest such as a beneficiary or trustee, together with Social Security numbers, dates of birth, addresses and any other identifying detail, which is what makes a later claim provable.
Reading a Montana result
A record here is listed under the name a company reported, so a maiden name, a business name and former Montana addresses each deserve a search, and anyone with mineral interests should also check the department's trust summary. Nothing expires. If a letter arrives first, read which kind it is: an auto pay letter means a check for up to $1,000 is already on its way and filing a claim only slows things down, while a claim letter needs the form completing.
And because Montana exchanges information with every other state once a year, a record that belongs to a former resident may already have been passed to the state they moved to.
Questions about unclaimed property in Montana
Related Montana records
Montana's other public records guides on this site are the Montana background check guide for the Department of Justice criminal records service, the Montana court records guide for the courts' public access, the Montana arrest records guide for what a booking makes public, and the Montana county pages for every county office.