This is the third article in a series walking through each stage of mass arbitration from start to finish. The first article covered what mass arbitration is and how it differs from a class action. The second article explained the demand letter and the informal resolution period that follows. Here, we pick up from the moment that the pre-filing phase ends, where formal arbitration procedures begin.

If you're new to the concept of Mass Arbitration entirely, our Mass Arbitration 101 guide covers the fundamentals before you dive into the process itself.

When Informal Resolution Doesn't Resolve Things

The demand letter stage exists because companies put it there. Most Terms of Service require claimants to go through a pre-filing notice and waiting period before arbitration can formally begin. Courts have generally enforced these requirements, so it’s an expected step in any claims process.

There's a reason companies include informal resolution processes in their Arbitration clauses: it gives them a chance to resolve disputes quietly, before the case becomes a formal legal proceeding with docketed claims, assigned arbitrators, and mounting administrative costs. In some cases, companies do use this window to settle claims early, especially when the legal exposure is clear and the volume of claimants is large.

But when companies don't engage seriously during this period — or make lowball responses that don't reflect the actual harm — the case moves forward. That's what formal filing is.

This isn't a failure. It's the process reaching the stage it was always designed to reach.

What "Filing" Actually Means

Filing for arbitration means formally submitting a claim to an arbitration forum, which is a private organization that administers the proceeding and provides a neutral decision-maker, called an arbitrator, to hear the case.

The two forums that come up most often in consumer mass arbitration are AAA (the American Arbitration Association) and JAMS. Which one governs a particular case depends on which the company named in their Terms of Service. Some companies have tried to switch forums mid-litigation when the original forum's rules proved unfavorable — courts have generally not looked kindly on that.

When a claim is filed, the forum receives the formal demand for arbitration on the claimant's behalf, along with the relevant case information and supporting materials. From that point forward, the dispute is no longer just a letter sitting in a company's legal inbox. It's an active legal proceeding with its own case number, its own administrator, and its own timeline.

What Gets Submitted

A formal arbitration filing typically includes:

• The Demand for Arbitration — the core document in any arbitration filing. Think of it like the formal equivalent to a complaint in a lawsuit. This identifies you as the claimant, names the company as the respondent, describes the nature of the dispute, and states what relief you're seeking.

• Supporting Documentation — Records, agreements, account information, or other evidence that establishes what the company did and how it affected you. Chariot and our Law Firm Partners help guide document gathering and submission; you are not expected to gather and submit your own paperwork.

• Any Required Filing Fees

In mass arbitration, the sheer number of coordinated individual filings matters. Each demand is its own case, but when thousands arrive at once, it creates a very different dynamic than a single person filing on their own. For more insight on the power of coordinated filing, read our blog: Fighting Back: Why Inaction Only Protects the Powerful

Filing Fees & Who Pays Them

One of the ways mass arbitration works in claimants' favor is through fee structure.

Most consumer arbitration agreements, because companies wrote them, require the company to pay the arbitration filing fees when a consumer initiates a claim. This is often true even under AAA's and JAMS' own consumer rules, which are designed to protect individuals from being priced out of the process.

What this means in practice: the more coordinated claims that are filed, the more a company is on the hook for in fees. That cost pressure is part of what makes mass arbitration an effective accountability tool.

What Happens After Filing

Once a claim is filed and accepted by the forum, the proceeding begins:

• The arbitration forum sends a notice to the company, officially informing them that a claim has been filed

• The forum begins the process of appointing an arbitrator, a neutral third party, often a retired judge or experienced attorney, who will oversee the case.

• Both sides may be asked to submit preliminary information, answer procedural questions, or agree on a scheduling order.

• In mass arbitration cases with large numbers of claimants, the forum may establish a bellwether process - selecting a smaller group of cases to go first, with the results informing how the remaining claims are handled.

That last point is worth understanding. Bellwether proceedings are common in mass litigation of all kinds because trying thousands of individual cases sequentially isn't practical. A sample of representative cases goes through the full arbitration process, and what happens in those cases, how the arbitrators rule, and what damages are awarded, creates a factual record that shapes how the broader group resolves. It's one of the reasons that how early cases in a mass arbitration are brought matters so much.

What Claimants Should Know at This Stage

Filing for arbitration doesn't require anything from you directly. Chariot and your attorneys with our partner firms handle the filing, the paperwork, and the forum coordination. You don't need to appear anywhere or sign new documents unless specifically contacted.

A few things are worth keeping in mind:

• Your claim is your own. Even though you're part of a coordinated group, each arbitration demand is filed individually. You're not part of a collective case where someone else controls the outcome.

• The Company has to respond. Once a claim is formally filed, the company is no longer in a position to simply ignore it. They have obligations to the forum, including deadlines, required filings, and fees. Failing to meet these requirements has consequences. The dynamic shifts.

• Timeline varies, but the process has a structure. Mass arbitration cases with large claimant groups move through different phases at different speeds, and some stages can feel slow from the outside. Once a case is formally filed, there are defined milestones, not just an open-ended waiting period.

Staying Informed Along the Way

As claims move into the formal filing stage and beyond, Chariot provides updates at key milestones. If you have questions about where your claim stands, you can check your dashboard at app.chariotclaims.com or reach the support team at support@chariotclaims.com.

The next article in this series will cover what the arbitration hearing process actually looks like, how arbitrators are selected, what both sides present, and how a case ultimately reaches a resolution. Stay tuned to the Chariot Claims Resource Page as the series continues.