In litigation, people need to point at a specific page and know that everyone is looking at the same one. Bates numbering is the convention that makes that possible: every page in a production gets a unique, sequential identifier stamped onto it, usually in a bottom corner. The name comes from the Bates automatic numbering machine that lawyers once used to stamp documents by hand, one page at a time. The idea has outlived the machine, and today the work is done in software, but the purpose is exactly the same. This is a practical guide to what it is, why discovery relies on it, and how to prepare a clean production without painting yourself into a corner.
Why unique sequential ids matter
During discovery, both sides exchange thousands or tens of thousands of pages. When a lawyer refers to a document in a deposition, a brief, or a court filing, they cite the Bates number, not the page of a file that might be paginated differently on someone else's screen. A page's file name can change, its position in a folder can change, and a PDF viewer might count cover sheets differently, but the stamped Bates number travels with the page itself and never moves. Because the numbers are unique and sequential, there is no ambiguity: ABC000451 is one specific page and always will be. It also makes gaps visible. If a production jumps from 000450 to 000480, everyone can see that thirty pages are unaccounted for and ask why. That accountability, and the shared, stable vocabulary it gives everyone in the matter, is the whole point of the system.
Prefixes, padding, and continuing batches
A Bates number is usually more than a bare count. It has a few parts worth understanding, and the Bates Numbering tool lets you set each of them before you stamp. Getting these choices right at the outset is what separates a production that runs smoothly from one that has to be redone. Decide the format before you stamp anything, because changing it later means re-stamping the whole set and reconciling every reference that already used the old numbers.
- Prefix: letters identifying the producing party or matter, such as ACME or SMITH_V_JONES, so one side's documents stay distinguishable when sets are combined.
- Padding: the fixed number of digits, so 123 becomes 000123. A consistent width keeps the numbers sorting correctly and looking uniform.
- Starting number: where the sequence begins, which matters enormously when you produce documents in more than one batch over time.
Real cases are not produced all at once. You send a first batch, then weeks later a second, then a third. The cardinal rule is that numbering continues; it never restarts. If your first production ended at ACME004000, your second begins at ACME004001. That is why the starting-number setting exists. Before you stamp a new batch, check where the previous one ended and set the start accordingly. A single overlap, where two different pages both carry ACME002500, can cause real confusion in a filing, so it is worth double-checking every time.
Where redaction and merging fit
Bates numbering is one step in a workflow, and order matters. Sensitive material, such as privileged content or personal data, has to be removed before anything leaves your office. The Redact tool blacks out the text and then permanently flattens the affected pages to images, so the hidden text cannot be copied back out or recovered by selecting behind the box. Do your redaction first, confirm it, and only then number the pages, so the numbers land on the final, cleaned version rather than one you still have to alter.
Merging comes into play when a production is assembled from many separate files, which is almost always the case when documents come from different custodians, systems, or dates. Use the Merge tool to combine them into one continuous document in the order you intend to produce it, and then apply Bates numbers across the whole thing in a single pass. Numbering the merged set at once is what gives you a clean, gap-free sequence. If you number the pieces separately and merge afterward, you risk duplicate or out-of-order labels that are tedious to unwind, and once a number has appeared in a filing it is awkward to change. Settle the order, then number, then produce.
A production checklist
- Collect and organize the documents in the exact order you will produce them.
- Redact anything privileged or sensitive, and confirm the redactions are flattened, not just visually covered.
- Merge the individual files into a single PDF in the final order.
- Choose your prefix and padding, and set the starting number to continue from the previous batch if there was one.
- Apply Bates numbers across the whole set, then spot-check the first and last pages of the range.
- For everyday documents that just need page numbers, reach for Number Pages instead; Bates Numbering is the specialized version discovery expects.