How to create a claims and defenses evidence matrix for Commercial Arbitration Matters

Create a claims and defenses evidence matrix by breaking each pleaded claim, defense, and requested remedy into propositions counsel must establish or rebut. Map each proposition to pinpoint evidence, contrary material, a sponsoring witness, and an assigned proof gap. For commercial arbitration, identify the procedural basis for obtaining or presenting missing evidence rather than assuming court-style discovery. The deliverable is a source-linked working table showing what the record supports, what remains disputed, and which evidence action should come next. Keep legal sufficiency separate from factual support.

When to use this workflow

Use this workflow when arbitration counsel assesses a demand and response, evaluates a production, prepares witness statements, or tests a proposed submission. In-house teams can use it to direct targeted searches and answer counsel’s factual questions without treating every missing document as equally important.

This guide assumes a US commercial dispute and uses AAA domestic commercial arbitration as a bounded procedural example. Identify the agreement, governing substantive law, applicable arbitration law, rules edition, procedural track, and tribunal orders. Do not apply the AAA example to another institution or an ad hoc proceeding without checking its procedures. The matrix organizes analysis; it does not supply claim elements or burdens.

What you need

Assemble the signed contract, incorporated schedules, amendments, arbitration clause, demand, response, counterclaims, and operative orders. Include correspondence concerning escalation prerequisites and disputed procedural arrangements.

Gather evidence specific to the commercial relationship: testing and acceptance records, defect notices, invoices, payment histories, change orders, delivery records, project correspondence, and accounting exports. Preserve document families and identify native files where formulas, timestamps, or attachments matter.

Counsel should supply a reviewed list of legal propositions under the selected substantive law. Flag unresolved elements, defenses, burdens, and remedy questions rather than presenting an unverified checklist as settled.

Maintain stable document IDs, source locations, witness roles, confidentiality markings, and a record cutoff. Separate event dates from document creation, transmission, and collection dates. Keep the document inventory outside the matrix and cross-reference it.

Use the template

The companion template is Commercial Arbitration Matters — Claims and defenses matrix. You can copy this table into your working document or spreadsheet.

Use one row per material proposition, not one per document. Split propositions when different evidence or actions would resolve their components. Give defenses and remedies separate rows linked to the claims they answer.

Basis / burden identifies the contract clause, counsel-approved authority, and unresolved allocations. Evidence fields need document IDs and page, paragraph, email timestamp, or workbook cell references. Distinguish source content from counsel’s inference.

Witness / foundation identifies who can explain the record and the basis of that knowledge. Gap / status distinguishes supported, disputed, missing, and awaiting legal analysis. “Supported” means the identified record supports the stated proposition, not that counsel has established legal entitlement. Action / owner records the task, responsible person, authorization status, and applicable direction or internal target. Keep sensitive analysis in a controlled working version.

Step by step

1. Establish the procedural frame

Prepare a short procedure map beside the matrix. Identify the arbitration clause, incorporated rules, applicable edition, procedural track, seat, and operative orders. Flag conflicts and unresolved authority questions.

AAA R-1 permits written procedural variations; modifications after arbitrator appointment require arbitrator consent. Its default edition is tied to satisfaction of administrative filing requirements. Check the agreement and applicable edition before selecting an evidence procedure. See AAA Commercial Arbitration Rules, R-1.

Distinguish tribunal deadlines from internal review targets. Link each proposed external evidence action to the controlling direction, rather than relying on an obsolete scheduling order.

Record: the procedure-map reference for actions requiring authority and an owner for unresolved procedural questions.

2. Convert pleadings into testable propositions

Read the demand, response, and counterclaims against the actual contract. Replace labels such as “defective performance” with propositions about identified obligations, conduct, dates, and consequences.

Separate contractual interpretation from historical fact. Whether a milestone requires written acceptance differs from whether an acceptance email was sent. Separate entitlement to a remedy from its calculation inputs. Distinguish a defense defeating payment from a counterclaim seeking affirmative recovery, even if both concern the same defect.

Do not infer burden allocation from which party possesses a document. Counsel must confirm the substantive analysis.

Record: stable row IDs, the pleaded theory, discrete proposition, contractual anchor, and unresolved legal issue. Link related rows rather than repeating the entire theory.

3. Attach supporting and contrary sources

Read each source in context, including attachments and surrounding correspondence. A successful-testing email may not establish acceptance of every contractual deliverable. An invoice establishes an amount billed, not necessarily an amount owed.

Place the strongest contrary source beside the supporting evidence. Separate direct evidence, recollection, and inference. Identify documents that repeat a single underlying account rather than treating repetition as independent corroboration.

Check whether a later message qualifies an earlier statement or whether a workbook excludes relevant credits. Absence from the collected record is not proof that a document never existed.

Record: pinpoint citations, factual descriptions, and source limitations. Mark references not checked against originals and assign verification before relying on them.

4. Test witnesses and foundations

Identify who can explain each material record, what that person observed, and what came from others. Link anticipated witness-statement paragraphs to rows and sources. Confirm availability and applicable examination directions.

AAA R-35 does not require conformity to legal evidence rules, but requires consideration of applicable privilege principles. Under R-36, failure to appear after the prescribed written notice may lead the arbitrator to disregard a statement or make another appropriate order. See AAA Rules, R-35–R-36.

Federal Evidence Rule 901(a) requires sufficient evidence that an item is what its proponent claims where federal evidence rules govern. It is not a universal arbitration requirement. See Federal Rules of Evidence, Rule 901(a).

Record: the witness, knowledge basis, foundation question, availability, and relevant direction. Assign potentially privileged material for counsel review before presentation.

5. Turn gaps into bounded evidence actions

Define the missing proposition before proposing another search or request. Specify the likely custodian, system, period, and record type. Distinguish uncollected material from withheld, unavailable, or apparently uncreated material.

AAA R-23 permits arbitrator-directed reliance-document exchanges and responses to reasonable document requests, subject to its possession-or-custody and relevance conditions. It also addresses electronic formats and search parameters; it does not establish federal-style discovery. See AAA Rules, R-23.

Keep proposed requests separate from authorized requests. Consider whether a client interview or existing production can answer the question. Do not assume a deposition is necessary or available.

Record: the evidence objective, proposed route, authorization status, owner, and deadline source. Refer detailed request wording and production tracking to a separate tracker.

6. Reconcile remedies with the merits record

Create separate rows for each requested remedy. Link monetary components to factual premises and contractual provisions, then trace calculations to records. Distinguish invoices, payments, credits, claimed losses, and disputed adjustments.

Reproduce spreadsheet calculations and inspect omitted transactions. Correct arithmetic does not settle entitlement, causation, or classification. Where the record cannot resolve an allocation, identify the uncertainty rather than selecting a convenient figure.

An internal damages spreadsheet is not automatically an evidentiary summary. Federal Evidence Rule 1006 concerns summaries of voluminous admissible materials and requires access to underlying originals or duplicates where those rules govern. Determine arbitration presentation requirements separately. See Federal Rules of Evidence, Rule 1006.

Record: source cells or transactions, assumptions, disputed adjustments, and the reconciliation owner.

7. Challenge and approve the working assessment

Have a second reviewer test disputed rows from the opposing perspective. Does the evidence prove the actual proposition? Does contrary material change its meaning? Would the proposed action resolve the uncertainty?

Preserve prior assessments when updating rows so counsel can identify what new evidence changed. Maintain a dated version and distinguish internal evaluation from tribunal-facing material. Prioritize unresolved rows by their effect on liability or relief, not simply document volume.

Record: updated status, reason for change, issue owner, and counsel’s decision to investigate, revise the theory, or use the row in drafting. Close an action only when its result is assessed, not merely when a request is sent.

Worked example

Entirely fictional scenario: Alder Manufacturing LLC seeks $420,000 in unpaid final-milestone fees from Bracken Systems Inc. under an equipment-integration agreement. Bracken disputes acceptance and counterclaims for $95,000 in corrective costs. Fictional clause 5.3 requires completion of a specified testing protocol and written acceptance. Clause 8.2 addresses defect notice and an opportunity to correct.

The record contains the agreement, selected emails, invoices, and a costs workbook. A testing attachment referenced in an operations email is missing. Separately, a defect-notice email references a fault-list attachment whose transmission is disputed. Fictional Order 2 permits targeted document requests but does not authorize depositions. Counsel’s substantive-law analysis remains incomplete.

The matrix changes three decisions. Operational success is not treated as contractual acceptance; testing and acceptance records receive priority. Notice analysis waits for verification of the transmitted family. Corrective costs require classification and attribution, not another addition check.

The disputed $18,000 does not establish a recoverable $77,000 balance. Neither the upgrade entries’ treatment nor the remaining costs’ entitlement is settled. The two missing attachments concern different propositions and require separate follow-up; their contents are not supplied by assumption.

Common mistakes

• Organizing only by document. A document index hides unsupported elements. Organize by proposition and cross-reference the inventory.
• Combining performance and acceptance. Separate observed operational results from contractual testing and acceptance conditions.
• Importing court discovery assumptions. Check the applicable track and directions before assigning a deposition or external request.
• Treating confidentiality as privilege. Track each separately and assign sensitive communications for counsel’s privilege analysis.
• Omitting adverse evidence. Include contrary material beside favorable proof so drafting reflects the actual dispute.
• Closing damages rows after checking totals. Test classification, attribution, credits, and entitlement as well as arithmetic.

Final quality check

• Every material claim, defense, and remedy has proposition-level rows.
• Contract versions, rules edition, and operative directions are verified.
• Each material citation resolves to the correct source and pinpoint.
• Evidence, contrary evidence, and inference remain distinguishable.
• Witness knowledge, availability, and foundations are checked or assigned.
• Missing-proof actions identify owners, authorization status, and deadline sources.
• Calculations reproduce from records, with assumptions and adjustments exposed.
• Open issues are resolved or expressly assigned; counsel approves any tribunal-facing version.

Complete the workflow with DecoverAI

DecoverAI is the Legal Intelligence Platform for litigation and transactions. Its litigation capabilities include document review, privilege and confidentiality analysis, chronology, and evidence analysis. Counsel can use these capabilities to examine the matrix’s supporting record and organize related chronology work and hearing preparation. The matrix remains counsel’s work product; legal sufficiency, authority, and presentation require human judgment. To discuss this evidence-analysis workflow, book a demo.

Frequently asked questions

Should each document have its own row?

No. Use proposition-level rows with multiple sources where appropriate. Maintain a separate inventory. Split rows when distinct facts, witnesses, or follow-up actions require separate decisions.

How should an unverified defense appear?

Identify it as pleaded or proposed, state the factual proposition, and mark its legal basis or burden unresolved. Counsel should decide whether legal analysis or evidence collection comes first.

Can the matrix double as a tribunal exhibit?

Not without separate review. Internal assessments may contain strategy, sensitive material, and disputed characterizations. Prepare an approved presentation version with checked citations and clear distinctions between facts and argument, consistent with applicable directions.

When should counsel update the matrix?

Update affected rows after material productions, interviews, amended pleadings, and tribunal directions. Record what changed and why. Before drafting, recheck central propositions against the current record rather than relying on earlier status labels.

Sources

• AAA Commercial Arbitration Rules, R-1, R-23, and R-35–R-36. The referenced compilation identifies September 1, 2022 effectiveness and a May 2025 footnote revision.
• Federal Rules of Evidence, December 1, 2025 compilation, Rules 901 and 1006; federal comparators, not automatic arbitration requirements.

Scope: October 13, 2026 research cutoff. This general workflow guide does not determine rights in a particular matter; those depend on the agreement, applicable law, facts, and tribunal directions.

This guide is general information about legal workflows, not legal advice for any matter. It was drafted and reviewed with AI assistance. The worked example is fictional. Contract rights and procedure depend on the governing law, the actual wording, and the facts, so check the cited sources and the rules that apply in your jurisdiction before relying on it.