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MonitoringMontana AG filing · December 12, 2025

Onset Financial Data Breach Exposes Personal Data in Montana

Onset Financial, Inc., a commercial equipment leasing company, reported a data breach to Montana authorities on December 12, 2025. The incident, which occurred on May 2, 2025, exposed a range of sensitive personal and financial data. Individuals affected by this breach should take immediate steps to monitor their accounts and credit to protect against potential fraud and identity theft.

State
Montana
Breach date
May 2, 2025
Reported
December 12, 2025

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Financial Account Number
  • Routing Number
  • Tax Return Information
  • Credit Score Information
  • Mailing Address

Onset Financial, Inc., a company specializing in commercial equipment leasing and financing, filed a data breach notification with the state of Montana on December 12, 2025. The filing indicated that an unspecified breach type impacted their systems on May 2, 2025.

The compromised information, according to the official report, included Full Name, Social Security Number, Date of Birth, Financial Account Number, Routing Number, Tax Return Information, Credit Score Information, and Mailing Address.

Exposure of this combination of personal and financial details presents a significant risk to affected individuals. Such data could be misused for various forms of fraud, including attempts at identity theft, unauthorized financial transactions, or opening new credit lines in a victim's name.

Individuals who receive a breach notification from Onset Financial, Inc. should closely review all financial statements and explanation of benefits for any suspicious activity. It is also widely recommended to obtain and review free credit reports from the major credit bureaus and consider placing a fraud alert or security freeze on their credit files as a precautionary measure.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

  • Freeze your credit

    Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.

  • Guard against tax fraud

    File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.

  • Watch your financial accounts

    Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.

  • Stay alert to targeted scams

    Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.

  • Keep your notification letter

    Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

What to know about the Onset Financial, Inc. data breach

How many people were affected by the Onset Financial, Inc. data breach, and what was exposed?
The filing does not give a count of affected people and lists the following information as involved: Full Name, Social Security Number, Date of Birth, Financial Account Number, Routing Number, Tax Return Information, Credit Score Information, Mailing Address. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Where can I see the official Onset Financial, Inc. breach notice?
Onset Financial, Inc.'s report is published by the Montana Attorney General: https://dojmt.gov/office-of-consumer-protection/reported-data-breaches/#mt-onset-financial-inc-2025 Compare it with the letter you received to confirm the dates and details match.
What should I do after getting the Onset Financial, Inc. data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Is the Onset Financial, Inc. data breach letter legit or a scam?
A notice from Onset Financial, Inc. in the mail matches the breach Onset Financial, Inc. reported to the Montana Attorney General on December 12, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Onset Financial, Inc. through a phone number or website you find yourself.
Did Onset Financial, Inc. offer free credit monitoring?
Check your letter from Onset Financial, Inc.. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Signing up doesn't waive any legal rights you may have.
Can I sue Onset Financial, Inc. over the data breach?
It depends on what was exposed, the law in Montana and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Is there a Onset Financial, Inc. data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Onset Financial, Inc.. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
How much could a Onset Financial, Inc. data breach settlement or claim be worth?
There is no set amount, and no Onset Financial, Inc. settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. The filing lists Full Name, Social Security Number, Date of Birth as involved. Keep receipts and records; they're what damages claims are built on.
Do I need a Onset Financial, Inc. data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.

Source: Montana Attorney General filing

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Onset Financial, Inc. Data Breach 2025: Filing Record