To Bates stamp documents, you assign each page a unique sequential identifier — usually a short prefix followed by a zero-padded number — then apply that identifier to every page in the production, either with a mechanical numbering stamp or through PDF or e-discovery software. The scheme is decided before any stamping starts, the sequence never repeats, and gaps have to be accounted for. That is how to Bates stamp documents in practice, whether the set is fifty pages or five million.
Decide the Numbering Scheme First
The choices you lock in before stamping the first page dictate whether the rest of the case runs smoothly. Changing schemes midstream creates confusion that takes hours to untangle.
Prefix
A prefix is a short set of characters placed before the sequential number to identify the source. The producing party’s initials, a case abbreviation, or a project code all work. When multiple parties are producing, prefixes prevent collisions: a plaintiff’s production running SMITH-000001 through SMITH-012000 sits cleanly alongside a defendant’s JONES-000001 through JONES-008500.
Keep prefixes short. Three to five characters is the sweet spot. Longer prefixes waste page space and are harder to dictate during depositions.
Digit Count and Starting Number
Decide how many digits your numbers will use before you begin. Six digits (000001) is common for mid-sized cases; eight or more suits document-heavy litigation. Leading zeros keep files sorting correctly in both computer systems and physical filing. Starting at 000001 is standard unless you have a reason otherwise, such as a rolling production picking up where an earlier volume ended.
Estimate your total expected page count over the life of the case, then add a healthy buffer. Running out of digits mid-production is exactly what Bates numbering is meant to prevent.
Write the Protocol Down
Record the prefix, digit count, starting number, and whether you’re numbering by page or by document. Put it in the ESI (electronically stored information) protocol or discovery plan and share it with everyone on the team. Inconsistency across paralegals or vendors is the most common source of numbering errors in large cases.
Prepare the Documents
Organize documents before stamping, because the sequence you stamp becomes the permanent order of the production. Group them however makes sense for the case: chronologically, by custodian, by topic, or to track the categories in the document request. Federal Rule of Civil Procedure 34(b)(2)(E)(i) requires a party to produce documents “as they are kept in the usual course of business or must organize and label them to correspond to the categories in the request.”1Legal Information Institute. Federal Rules of Civil Procedure Rule 34 – Producing Documents, Electronically Stored Information, and Tangible Things, or Entering onto Land, for Inspection and Other Purposes
For paper, check that every page is legible; a faded photocopy that can’t be read after stamping is useless. Remove staples, paper clips, and sticky notes that could obscure content or jam a stamping machine. For digital files, convert everything to a consistent format, typically PDF, before numbering. Mixing file types mid-production causes verification headaches later. And before stamping anything digital, save an unstamped copy — if the numbering goes wrong, you need clean originals to restart from.
Stamping by Hand
Manual stamping is still used for smaller sets and for originals that can’t be scanned. The tool is a mechanical numbering machine with rotating digit wheels. You set the starting number using a stylus to adjust each wheel, press the stamp onto the page, and the machine automatically advances with each impression.
Numbering machines come with different digit capacities, commonly eight or ten digits, but you don’t have to use all of them. A ten-digit machine can print only six digits if the unused wheels are moved to the blank position. Self-inking models remove the need for a separate ink pad and produce more consistent impressions across a long session.
Place the stamp in the same location on every page. The bottom-right corner is the most common choice, similar to standard page numbers. Pick a spot that won’t overlap existing text, margins, or Bates numbers from a prior production. After each batch, flip through and confirm every impression is legible and that the sequence advanced correctly. A skipped or double-stamped page caught early is a minor fix; discovered months later during a deposition, it becomes a credibility problem.
Stamping Digitally
Most productions today are digital, and the stamping happens inside software. It’s faster, more accurate, and handles batch processing that would take days by hand.
Adobe Acrobat Pro
Acrobat Pro has a built-in Bates numbering feature that works well for straightforward productions:
- Open your PDF, select Edit, then More, Bates Numbering, and Add.
- In the Bates Numbering dialog, add individual files, entire folders, or files already open. Use Move Up and Move Down to set the order.
- Choose a target folder and file-naming preferences for the stamped copies.
- Place your cursor in the header or footer box where you want the number, then select Insert Bates Number. Set the digit count (the default is six; the range is three to fifteen), the starting number, and any prefix or suffix text.
- Select OK, and Acrobat stamps every page across all selected files in sequence.
Acrobat also lets you add Bates numbers to existing file names, useful when filenames need to reflect the Bates range of their contents.2Adobe Help Center. Add Bates Numbering in Acrobat Pro
E-Discovery Platforms
For larger cases, dedicated e-discovery platforms like Relativity, Everlaw, and DISCO handle Bates numbering as part of the production workflow. They automatically track sequences across rolling productions, flag potential duplicates, and generate the load files litigation support teams need for review databases. If you’re producing more than a few hundred pages, or if multiple team members are involved, purpose-built software beats a general PDF editor.
Cheaper options exist too. PDF-XChange Editor, Sejda, and other PDF utilities offer Bates numbering at a fraction of Acrobat’s cost, sometimes free for basic use. The trade-off is fewer automation features and less integration with review platforms.
Native Files That Can’t Be Stamped
Not everything in a modern production starts as a PDF. Spreadsheets, emails, chat messages, and database exports all resist traditional stamping. Converting native files to PDF can strip out metadata like author information, creation dates, and email threading. For emails, conversion may break the link between messages and their attachments, damaging the integrity of the record.
The workaround is to assign the Bates number through the filename rather than stamping it onto the document content. The producing party renames each file to reflect its Bates number, and the original filename is preserved in an accompanying load file. Because filenames sit outside the file’s content, renaming doesn’t alter the data or its hash value, the digital fingerprint that proves the file hasn’t been tampered with. When someone later prints the native file for a proceeding, the Bates number gets applied to every printed page alongside standard page numbers.
If your case involves significant native-file volume, discuss the approach with opposing counsel early. Agreeing on the protocol in the ESI agreement prevents disputes later about whether your production was properly identified.
Privileged Documents in the Sequence
When you withhold a document on privilege grounds, it still needs a place in the numbering. The standard approach is to assign the withheld document a Bates number and replace its content with a single-page placeholder, sometimes called a slip sheet, showing the privilege designation (such as “Withheld – Attorney-Client Privilege”) and the assigned number.
The privilege log you provide to opposing counsel must identify each withheld document with enough specificity for the other side to assess the claim. Putting the Bates number on the log entry ties the log to the production sequence and shows the gap was intentional. A gap without a corresponding log entry raises immediate suspicion that documents were improperly withheld or lost.
Catching Duplicates and Gaps
Numbering errors fall into two categories, and both are mostly preventable.
Duplicates happen when two different pages end up with the same number, usually because multiple team members stamped different batches without coordinating starting numbers. Use a single tracking system for number assignment. Document management software detects duplicates automatically, but even a shared spreadsheet logging each batch’s starting and ending numbers works if everyone actually uses it.
Gaps happen when pages get pulled after numbering or when a stamping machine skips. Unexplained gaps invite accusations of undisclosed withholding. Every gap needs an account: a privilege log entry, a note that the page was a duplicate removed after initial numbering, or a correction notice to opposing counsel. If you discover an error after production, notify opposing counsel with a corrective letter identifying the affected Bates ranges and the nature of the error. Do not silently re-stamp and re-produce. Transparency about errors is far less damaging than having the other side find them.
Run verification after every stamping session. For digital productions, spot-check a random sample of files to confirm the stamp is visible, legible, and correctly placed. Confirm the first and last numbers in each batch match your tracking log. For large productions, automated tools that scan for sequence gaps are worth the cost. A few practices tighten the whole workflow further:
- Stamp in one pass whenever possible. Going back to insert pages into an already-numbered set forces renumbering and creates fresh error opportunities.
- Use consistent formatting — same font, same size, same position on every page — so anyone can find the number without hunting.
- Never restart a sequence mid-production. If your first production ends at SMITH-004500, the second starts at SMITH-004501. Restarting at 000001 in a later volume guarantees confusion.
- Keep a master log tracking every production by date, Bates range, and recipient. It becomes essential if there’s ever a dispute about what was produced and when.