Creating a communication chronology for a lawyer

When a lawyer asks you to put together a timeline of communications, they're asking for something specific. Not a summary of how you feel about the situation. Not a narrative of what happened. A structured, chronological record of who said what, when, on which platform, with references to the source material. The better your chronology, the less time (and money) your lawyer spends sorting through raw data, and the more effectively they can use it.

This guide covers what lawyers need, how to format it, and how to organize the supporting documents. This is not legal advice - it's practical guidance on preparing records that lawyers can work with.

What lawyers need from a communication timeline

A communication chronology serves as a reference document. Your lawyer uses it to:

• Understand the sequence of events without reading every message
• Identify which communications are relevant to specific legal issues
• Locate source documents quickly when preparing filings, discovery responses, or court exhibits
• Assess the strength of evidence before deciding how to proceed

To serve these purposes, each entry in your chronology needs to answer five questions: When did this happen? Who was involved? What was said? Where was it said? Why does it matter?

The essential fields

Build your chronology as a table. Each row is one communication event. The columns:

Date and time. As precise as available. Use a consistent format throughout - 2026-03-10, 2:45 PM AEDT or March 10, 2026 at 14:45 - pick one and stick with it. If you only know the date and not the time, note that. If the timestamp is approximate, say so.

Platform/channel. Where the communication happened: iMessage, WhatsApp, email, Slack DM, Instagram DM, phone call, in person. This matters because different platforms carry different weight and different metadata.

Participants. Who sent the message and who received it. For group conversations, note all participants, not just the sender. For emails, include To, CC, and BCC fields.

Content. The substance of the communication. For key messages, quote directly - exact words, copied from the source. For routine messages, a summary is acceptable. Make the distinction clear: put direct quotes in quotation marks, and label summaries as such.

Source reference. Where the lawyer can find the original. This is a pointer to your supporting documents: "See Exhibit A-14" or "WhatsApp export, page 23" or "Screenshot folder, file 2026-03-10_imessage_01.png." Without this, the chronology is a summary with no backup.

Relevance note (optional but valuable). A brief note on why this entry matters to the case. "This contradicts the claim made in the March 15 email" or "First instance of the demand discussed in paragraph 12 of the complaint." Keep this factual, not emotional.

Table format vs. narrative format

Table format is what most lawyers prefer for working documents. It's scannable, sortable, and lets them jump to specific dates or topics without reading everything sequentially.

Narrative format works for summaries or when the chronology needs to tell a story for a court filing. Write it as numbered paragraphs, each covering one communication or a tight cluster of related messages, with source references inline.

15. On January 15, 2026, at 9:12 AM, J. Smith sent an email stating: "We agreed the deadline is February 1. Please confirm." (Exhibit A-14.) At 11:30 AM the same day, I confirmed via iMessage: "Confirmed. February 1 works." (Exhibit B-7.)

Ask your lawyer which format they prefer before spending hours on the wrong one.

What to include and what to leave out

Include:

• Communications directly relevant to the legal issues
• Messages that establish timelines, agreements, or contradictions
• Exchanges that show patterns relevant to the case
• Messages where tone, frequency, or timing is part of the claim
• Communications with third parties that provide context (with your lawyer's guidance on relevance)

Leave out:

• Routine messages unrelated to the dispute ("What do you want for dinner?")
• Your interpretations of what someone meant - present what they said, let the lawyer interpret
• Communications your lawyer hasn't asked about, unless you believe they're relevant (flag these separately)
• Privileged communications (messages between you and your lawyer) - these should never appear in a chronology shared with the other side

When in doubt about inclusion, err on the side of including it and flagging it for your lawyer's review. It's easier for them to remove an irrelevant entry than to discover a gap later.

Organizing supporting documents

Your chronology references source documents. Those documents need to be organized so your lawyer (or their paralegal) can find any referenced item within seconds.

Create a consistent naming convention: [Date]_[Platform]_[Description].[ext] Example: 2026-03-10_whatsapp_smith-conversation.pdf

Organize by exhibit number or chronological order. If your lawyer uses exhibit numbers, match your file naming to their system. If not, chronological naming works well.

For exports, save both the original format (JSON, CSV, EML) and a readable version (PDF, HTML). Label them clearly: 2026-Q1_messenger-export_original.json and 2026-Q1_messenger-export_readable.pdf.

For screenshots, number them sequentially within each conversation and include the date in the filename. Store them in a folder per conversation or per platform.

Create an exhibit index - a simple list mapping exhibit numbers to file names and descriptions. This saves enormous time during preparation and in court.

Common mistakes to avoid

Editorializing in the content column. Write "J. Smith wrote: 'You're being ridiculous'" not "J. Smith was dismissive and rude." Your lawyer decides how to characterize the communication.

Inconsistent timestamps. Mixing timezone formats or 12/24-hour notation creates confusion and undermines credibility. Standardize everything.

Missing source references. A chronology entry without a source reference is just your word. Every entry should point to a document the lawyer can verify.

Presenting incomplete threads as complete. If you're including emails from a thread but not all of them, note what's omitted and why. Presenting a partial record as complete can backfire.

Over-including. A 200-page chronology covering every text message for three years is less useful than a 30-page chronology focused on the communications that matter. If the volume is large, consider a summary chronology for key events and a detailed appendix for supporting messages.

Tools that help

Spreadsheet software (Excel, Google Sheets) is the standard tool for building chronologies. It handles sorting, filtering, and formatting well.

For gathering the raw material, message export tools - iMazing for iMessage, platform data downloads for social media, email export features - produce the data you'll work from. Receipts can consolidate messages from multiple platforms into a single chronological view, which gives you a starting point to work from when building the formal chronology.

Whatever tool you use, the output should be something your lawyer can open, navigate, and verify without needing the same tool. PDF or Excel files are universally accessible. Proprietary formats are not.