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Investigation OpenCA AG filing · December 15, 2025

Event Rental Systems Data Breach: What Affected Individuals Should Know

Fullsteam Software Holdings LLC, operating as Event Rental Systems, recently disclosed a data security incident that may have exposed personal information. If you received a notification letter, your data could be at risk, prompting the need for vigilance and potential legal consideration. Our legal team is actively reviewing the details to support those affected.

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This breach is real, not a scam. Fullsteam Software Holdings LLC d/b/a Event Rental Systems officially reported it to the CA Attorney General on December 15, 2025.

Reviewed by David S. Harris, Esq., data breach and class action attorney (Florida Bar No. 0112739). Free consultation: 786-306-7278

Received a Fullsteam Software Holdings LLC d/b/a Event Rental Systems notification letter? Find out in minutes if you qualify for compensation.

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State
CA
Breach date
September 16, 2025
Reported
December 15, 2025

Fullsteam Software Holdings LLC, operating as Event Rental Systems, recently reported a data security incident. This breach, which occurred around September 16, 2025, led to notification letters being sent to affected individuals in California beginning December 15, 2025, confirming that personal information may have been compromised.

When a company like Event Rental Systems experiences a data breach, it means that unauthorized parties may have gained access to sensitive records. While the specific nature of the information involved in this incident has not been fully detailed, any exposure of your personal data creates risks you should be aware of.

If you received a notification letter from Event Rental Systems, it’s important to carefully review its contents. We recommend immediately monitoring your financial accounts and credit reports for any suspicious activity. Consider placing a fraud alert with credit bureaus as a proactive measure to help protect your identity.

Beyond these initial steps, understanding your legal options is crucial. Companies have a responsibility to protect your personal information, and when they fail, victims may be entitled to seek compensation. Our team focuses on helping individuals like you navigate the complex legal landscape that follows a data breach.

We offer free, no-obligation case reviews for individuals affected by the Event Rental Systems data breach. If you are concerned about your exposed personal information, reach out to our dedicated team. We are here to assess your situation and explain how we can advocate on your behalf.

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

  • 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.

Fullsteam Software Holdings LLC d/b/a Event Rental Systems data breach lawyer, lawsuit and letter questions

Do I need a Fullsteam Software Holdings LLC d/b/a Event Rental Systems data breach lawyer or attorney?
You don't need to pay to find out. Our data breach attorneys review notices like this one for free, and data breach cases are usually handled on contingency — no fee unless money is recovered for you.
Can I sue Fullsteam Software Holdings LLC d/b/a Event Rental Systems over the data breach?
It depends on what was exposed, the law in CA 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 Fullsteam Software Holdings LLC d/b/a Event Rental Systems 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 Fullsteam Software Holdings LLC d/b/a Event Rental Systems. 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.
Is the Fullsteam Software Holdings LLC d/b/a Event Rental Systems data breach letter legit or a scam?
A notice from Fullsteam Software Holdings LLC d/b/a Event Rental Systems in the mail matches the breach Fullsteam Software Holdings LLC d/b/a Event Rental Systems reported to the CA Attorney General on December 15, 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 Fullsteam Software Holdings LLC d/b/a Event Rental Systems through a phone number or website you find yourself.
Did Fullsteam Software Holdings LLC d/b/a Event Rental Systems offer free credit monitoring?
Any free monitoring Fullsteam Software Holdings LLC d/b/a Event Rental Systems is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Enrolling does not give up your right to bring a claim.
How much could a Fullsteam Software Holdings LLC d/b/a Event Rental Systems data breach settlement or claim be worth?
There is no set amount, and no Fullsteam Software Holdings LLC d/b/a Event Rental Systems 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. Keep receipts and records; they're what damages claims are built on.
Where can I see the official Fullsteam Software Holdings LLC d/b/a Event Rental Systems breach notice?
Fullsteam Software Holdings LLC d/b/a Event Rental Systems's report is published by the CA Attorney General: https://oag.ca.gov/privacy/databreach/list#fullsteam-software-holdings-llc-d-b-a-ev-2025-12-15 Compare it with the letter you received to confirm the dates and details match.
What should I do after getting the Fullsteam Software Holdings LLC d/b/a Event Rental Systems 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.

Source: CA Attorney General filing

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