Add Bates numbers to every page — built for legal discovery

What is Bates numbering — and why does every legal production need it?

Bates numbering is a method of placing a unique, sequential identifier on every page of a document — typically a prefix followed by a zero-padded counter, like ABC000001, ABC000002, ABC000003. It is the universal convention in legal discovery, e-discovery and document production: every produced page receives one Bates number so any party in a matter can refer to a specific page unambiguously across thousands or millions of documents. A deposition transcript can cite "Smith Dep. 47:12 referring to ABC014892" and every lawyer, paralegal, judge and expert knows exactly which page in the entire production is being discussed. The convention is so deeply embedded in litigation practice that producing documents without Bates stamps is essentially a procedural error — the receiving side cannot meet-and-confer about specific pages, and the producing side has no defensible way to prove what was actually produced.

The name comes from the Bates Manufacturing Company, which patented the mechanical stamping device in 1891 — a self-incrementing rubber stamp that lawyers and clerks would press onto every page of evidence. The hardware is now a museum piece, but the convention is alive, well and required in every common-law jurisdiction. PdfDocShift digitises that hundred-year-old workflow into a single upload.

Prefix, digits, position, font, start number — every Bates stamp option explained

Prefix. The text that comes before the counter. Conventions vary: many firms use the matter abbreviation (SMITH_v_JONES_), the producing party's initials (DEF, PLF, ABC), an internal review code (PROD2024_), or the law firm code. The prefix is the same on every page of a production but typically changes between producing parties — so the receiving side can tell at a glance which side a page came from.

Number of digits. The counter is zero-padded to a fixed width — that is what aligns the stamps visually across the production. Choose a width that comfortably exceeds the highest number you expect to reach. Four digits (ABC0001) for small matters under a thousand pages. Six digits (ABC000001) for typical commercial litigation — this is the most common choice and supports up to 999,999 pages per prefix. Seven or eight digits for large e-discovery productions with millions of pages.

Starting number. This is what makes Bates ranges chainable. If your previous production ended at ABC000482, set the start number to 483 for the next batch and the new file will pick up at ABC000483 — no gaps, no duplicates, no renumbering. For a production split across many files, you can also merge them first using Merge PDF, stamp the combined document in a single pass, then split the result back into the original files using Split PDF.

Position. Six standard positions are supported: bottom-right (the default and most common in US litigation), bottom-centre, bottom-left, top-right, top-centre and top-left. The stamp is inset by a safe margin from the page edge so it will not be clipped when printed, and the same position is used on every page so the production is visually consistent. Pick a position that does not overlap the document's existing footer or header text — bottom-right is safe for almost all corporate and legal documents.

Font, size and colour. Helvetica, Times Roman or Courier in any size from 6 to 36 points, in black, red or blue ink. Black 10-pt Helvetica is the de-facto default and works for virtually every production. Red is sometimes used to mark privileged or attorney-eyes-only material so the stamps stand out during review. Courier is preferred by some federal courts because the fixed-width characters align tidily in column with itemised exhibit lists.

Who actually uses Bates numbering?

Litigators and paralegals stamp every document produced in discovery — interrogatory answers, document requests, deposition exhibits, trial exhibits — so opposing counsel and the court can cite specific pages. E-discovery review teams at firms like Relativity, Everlaw, DISCO, Logikcull and Reveal ingest documents pre-stamped (or stamp on export) so every document in the review database has a globally unique page identifier. Corporate legal departments stamp regulatory submissions, audit responses and subpoena responses. Forensic accountants and expert witnesses stamp their working files so their reports can cite source material by Bates range. Public-records officers stamp FOIA and freedom-of-information productions so requesters and journalists can refer to specific pages. M&A diligence rooms use Bates-style numbering to track which documents were disclosed during due diligence. If your work involves producing documents to a third party who needs to refer back to them later, you need Bates numbering.

How PdfDocShift stamps your file

The pipeline is intentionally minimal. Stage 1 — overlay generation: for every page in your PDF, we render a small text overlay containing the prefix, the zero-padded counter for that page, and the optional suffix, using the font, size and colour you selected. The overlay is positioned in the chosen corner with a safe inset from the page edge. Stage 2 — page stamping: the overlay is added to the existing page using pdf-lib's drawText primitive — this places new content on top of the existing page without modifying the underlying text or image objects. The original page content remains intact: searchable text is still searchable, embedded images keep their resolution, page sizes and orientations are preserved exactly. Stage 3 — output: the stamped file is written out as a clean PDF and made available for download. If you also need a non-editable, locked output (so the stamps cannot be removed), run the result through Flatten PDF — that bakes the overlay into the page so it becomes part of the static page content.

Best-practice tips for a clean production

Pick your prefix and digit width before the matter begins and keep them constant across every production. Changing them mid-matter creates citation chaos. Reserve a comfortable digit width — running out of numbers because you chose four digits and produced 10,000 pages forces a renumber, which means every prior citation breaks. Stamp after redaction, not before — if you stamp first, then redact, the Bates numbers may end up in redacted regions and require restamping. Combine Bates numbering with PDF/A for archival productions: stamp the file here, then convert with our PDF/A Converter so the resulting file is both citable and preservable. Keep a Bates log alongside the production: a CSV listing the start and end Bates number for each underlying document — this is what attorneys and review teams use to navigate a large production. If your matter requires confidentiality designations, use the suffix field to append CONFIDENTIAL or ATTORNEYS' EYES ONLY to every stamp — or, for designations that apply only to a subset of pages, do that as a second pass using our Watermark PDF tool.