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Bates Numbering

Last updated: 2026-03-23

Bates numbering (also called Bates stamping) is a sequential numbering system used in legal proceedings to assign a unique identifier to every page or document in a collection. It ensures precise reference during discovery, depositions, and trial. Any party can locate a specific page within a production with certainty.

What is Bates numbering?

Bates numbering originated in the late 19th century with the Bates Automatic Numbering Machine, a mechanical stamp that printed sequential numbers onto paper documents. The system became standard practice in litigation because it gave every page a permanent, unique identifier. That identifier couldn't be altered or confused with another document's reference. Today, Bates numbers remain the dominant method for organizing and citing documents in legal proceedings.

Each Bates number typically consists of an optional prefix, a zero-padded numeric sequence, and an optional suffix, producing identifiers such as ABC000001 or DOC00100-PRIV. This format allows parties, courts, and counsel to refer to any specific page without ambiguity during depositions, motions, and trial testimony.

In modern e-discovery, Bates numbering applies equally to electronic documents. PDFs, emails, spreadsheets, and images all receive sequential identifiers during production. Courts routinely require Bates numbers for document identification, and failure to provide them can result in objections or sanctions.

"A party must 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."-- Federal Rules of Civil Procedure, Rule 34(b)(2)(E)(i)

Key facts

  • According to RAND Institute for Civil Justice research, document review accounts for approximately 73% of total e-discovery costs.
  • Proper document numbering and organization reduces review time by enabling precise cross-referencing between parties.
  • FRCP Rule 34(b)(2)(E) governs document production format, requiring that documents be organized and labeled to correspond to discovery requests.
  • Most courts expect Bates-numbered productions as standard practice in civil litigation, and some local rules explicitly mandate them.

Bates numbering in Hintyr

Hintyr includes built-in Bates numbering that stamps unique sequential identifiers on your legal documents. You can apply Bates numbers automatically on upload using automatic numbering, manually through the file menu, or during export to produce numbered copies while leaving your originals untouched.

Hintyr supports both document-level mode (one number per file) and page-level mode (one number per page). You can configure prefix, suffix, digit padding, start index, and stamp position through the numbering options panel. The auto-position feature places stamps intelligently based on document layout, and AI-assisted Bates stamping lets you apply numbers through agent commands.

Frequently asked questions

What is the difference between document-level and page-level Bates numbering?
Document-level numbering assigns one Bates number per file, regardless of page count. Page-level numbering assigns a unique number to every individual page. Page-level is the standard for most litigation productions where counsel needs to cite specific pages.
Are Bates numbers required by law?
There is no single federal rule that mandates Bates numbering by name, but FRCP Rule 34(b)(2)(E) requires documents to be organized and labeled for production. Courts routinely expect Bates-numbered productions, and many local rules explicitly require them.
Can I change Bates numbers after they have been applied?
Yes. In Hintyr you can re-stamp documents with a different format at any time. The new stamp replaces the previous one, and Hintyr tracks stamp history for audit purposes.
How does Hintyr prevent gaps in the numbering sequence?
Hintyr tracks the last assigned number in each case and continues sequentially from that point. You can also run gap detection to identify any missing or duplicate numbers in your sequence.

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