How to Read a Mandatory Arbitration Clause Before You Sign

Finance has said yes. Monday go-live is booked. The vendor MSA — a master services agreement the vendor hangs order forms on — still hides a Delaware AAA clause whose filing fees can eat a typical unused-seat claim. Test shall versus may, name the seat and the Commercial rules, run the fee on your claim size, then keep English courts, split, or walk.

On 3 September 2026, Anouk — Ops at a 25-person UK SaaS — has Finance’s yes on a US workflow tool. Clause 15: any dispute may be submitted to AAA Commercial Arbitration Rules, seat Wilmington, Delaware. Each side pays half the panel. Class waived. No small-claims sentence. No IP injunction. AE Slack: “standard AAA — cheaper than court.” Last year: an £18,000 unused-seat true-up. Typical mistake under Monday pressure: treating the heading as a quieter court.

Disclaimer: Checkory provides AI support, not legal advice. Consult a qualified lawyer for binding decisions.

How do you tell whether “shall” or “may” closes the court door?

Search the MSA and the order form for shall, must, exclusive, finally resolved, may, and class. “Shall be finally resolved by arbitration” is exclusive. “May be submitted” is not a free court run: either side can insist. Treat Anouk’s “may” plus judgment-on-the-award plus a class waiver as mandatory.

In England and Wales (and on Privy Council appeal) Anzen Ltd v Hermes One Ltd [2016] UKPC 1: “may” lets either side insist — a stay is enough (Mintz survey, structure-only). US courts under the FAA read “may” the same way. Do not copy 2026 guides that still label “may” as voluntary.

A true optional clause needs words that survive if one side files in court. If the order form names a different forum, rank the stack on the MSA vs order form precedence guide. Do not accept “it’s only may.”

What does the seat, institution, and rule-set actually name?

Write four blanks before you argue fees: administrator, exact rule-set, number of arbitrators, and seat — the legal place, not the Zoom room. “Arbitration in Delaware” with no institution is pathological.

Tick AAA versus JAMS versus LCIA. Then Commercial Rules, not Consumer. AAA Commercial Rules (2025) default to one arbitrator if silent, unless AAA directs three. Three arbitrators are a cost bomb on an £18k credit. Hearings can sit in London and the seat is still Wilmington (LCIA FAQ).

If the clause is silent, Arbitration Act 2025 s.6A (in force 1 August 2025, England and Wales and Northern Ireland) defaults the arbitration-agreement law to the seat. Delaware seat, Delaware/US clause-law. MSA governing law is not that choice. The LCIA recommended clause is the split ask: one arbitrator, seat London, England. Keep AAA plus Delaware only if you accept FAA supervision and US fee PDFs.

Checklist: how do you run the filing-fee math on a realistic claim?

Pick Anouk’s band — unused seats, failed onboarding, SLA credit — £15,000 to £40,000, not a US$1m hypothetical. Open the live Commercial PDF. Do not use the consumer US$200 schedule. Add half the panel if fees split. Then ask whether arbitration is cheaper than court on this claim.

The AAA Commercial fee schedule (effective 1 September 2025, live 3 September 2026) bills under US$75,000 at US$1,450 plus US$1,150 final — US$2,600 admin before anyone decides. Three arbitrators: US$4,825 plus US$4,175. Emergency add-on US$3,500. Admin is not arbitrator hours.

JAMS two-party filing is US$2,500 plus a 13% case-management fee on every arbitrator hour. The consumer US$250 cap is not this B2B MSA. LCIA starts at a £1,950 registration fee (still live); admin does not jump with claim size. For example, an England and Wales issue fee on an £18k claim is a few hundred pounds. Fees that can exceed the claim = split or walk.

When to demand small-claims and IP injunction carve-outs?

If there is no carve-out, a £3k invoice fight still goes to Delaware AAA. Write a named court and a mutual IP door. Emergency-arbitrator add-ons are extra money, not a same-day leak order. Vendor-only injunction is a trap. No named small-claims court and no mutual IP door = split.

A “small claims court” sentence that does not name a court is a fight: Delaware Justice of the Peace is not the England and Wales small-claims track (generally £10,000). Write the court. For SaaS, demand a mutual right to seek interim relief in a named court — the English High Court or where the breach is happening — to protect source code and IP.

Draft the carve-out as claims for that relief, not “any action seeking injunctive relief.” The ABA note on Archer & White (structure-only) is the trap: a sloppy carve-out can swallow the case. AAA emergency filing is an extra US$3,500. Reject a vendor-only injunction.

Who pays the panel — and what does the class waiver block?

Anouk’s ALL-CAPS waiver is the US vendor default. It mainly blocks joining other customers on the same overcharge. The live deterrent is the next sentence: each party bears one-half of the arbitrator’s fees. That 50/50 means she pays to complain.

Under the FAA, class waivers in commercial paper are generally enforced even when individual arbitration is uneconomic (American Express v. Italian Colors Restaurant, 2013 — structure; AT&T Mobility v. Concepcion, 2011 — structure). Do not write PAGA as her plot. Do not tell a UK SME the waiver is void. Ask: vendor pays admin and the panel below the US$75,000 AAA band; sole arbitrator.

A US “prohibitive fees” line exists, with the burden on the claimant. It is not a UK get-out. The commercial move is split or walk. Class waiver plus 50/50 plus no cost-shift = split. If they refuse cost-shift and refuse carve-outs, walk.

Which door do you keep: courts, split, or walk?

Success bar: a one-page log and one sentence that would pause signature. Say why “may” is not a free court run, and why you did not use the consumer fee. How much you can recover after you can afford to file is a different paper — the MSA liability cap guide.

Courts: exclusive England and Wales; no pre-dispute arbitration. Sensible on £15–40k credits. Split: LCIA, one arbitrator, seat London; vendor pays below US$75k; named small-claims court; mutual IP injunction. Walk: AAA Commercial plus Delaware plus 50/50 plus no carve-outs plus filing that can exceed the typical claim plus Monday demanded.

Anouk’s Clause 15 should pause Monday. After the log, upload the same PDF for a first-pass — a machine extract of headings — at Checkory document analysis. A human still opens the clause and the live fee PDF. Escalate a High flag — pause until a human opens that line — to counsel — a qualified lawyer. Workflow: shall vs may → name institution + seat + rules → fee math on a realistic claim → small-claims + IP injunction → class waiver + who pays → courts / split / walk.