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What Is Bates Numbering in PDF?
Bates numbering is a sequential identification system used to label pages or documents with unique reference numbers, commonly for document organization, corporate record-keeping, and legal discovery. A standard Bates number in a PDF combines an alphanumeric prefix, a delimiter, and a zero-padded sequential number, such as CASE-000001, CASE-000002, and CASE-000003.
Bates Numbering PDF on PDFZento lets you apply sequential Bates identifiers to PDF pages directly in your browser. Upload your document, configure your starting number, prefix, padding digits, position, and font, preview the stamp in real time, and export the numbered PDF with 100% private, on-device processing.
Originally created for manual paper stamping in legal discovery and courtroom document production, Bates numbering (also known as Bates stamping) is widely used across legal practices, accounting, government disclosures, financial audits, medical records management, and corporate archives. PDFZento stamps Bates numbers directly onto your PDF as clean, searchable vector text without flattening or altering your underlying document text, forms, or imagery.
Bates Numbering vs Regular PDF Page Numbers
A frequent question when managing documents is how Bates numbering differs from standard page numbers:
- Regular Page Numbers: Identify page position within an isolated document (e.g., "Page 1 of 10"). If you need simple document pagination, use our tool to add regular page numbers to a PDF.
- Bates Numbers: Assign unique, continuous sequential identifiers (e.g.,
CASE-000001throughCASE-004500) across hundreds or thousands of pages and across multiple separate PDF files in a production set. They provide an absolute reference index for litigation review, discovery sets, and compliance audits. - Watermarks: In contrast to both numbering methods, a watermark applies a visual overlay (such as "CONFIDENTIAL" or a logo) across the body of a page. If you need a background status mark rather than sequential numbering, you can add a watermark to a PDF.
How to Add Bates Numbers to a PDF (Bates Stamping)
Follow these straightforward steps to Bates stamp a PDF online:
- Upload your PDF: Drag and drop your PDF file into the upload area above, or choose multiple files for continuous sequential numbering across all documents.
- Configure your prefix & sequence: Set your custom label prefix (e.g.,
CASE2026,DISCOVERY,EXHIBIT), starting number, separator, and digit padding. - Adjust placement & typography: Select your preferred page position (top or bottom; left, center, or right), edge margin in points, font family, font size, and color.
- Check the live preview: Review the interactive first-page preview to verify typography and exact stamp coordinates before processing.
- Apply Bates numbers & download: Click Process Bates Numbering PDF to stamp your document locally and download your numbered PDF instantly.
Bates Numbering Format Examples
You can customize the prefix, separator, and digit padding to match specific case, audit, or discovery requirements:
Standard Legal Discovery
Prefix: CASE • Digits: 6 • Start: 1 • Separator: -
CASE-000001CASE-000002CASE-000003
Trial Exhibit Stamping
Prefix: EXHIBIT_A • Digits: 4 • Start: 100 • Separator: _
EXHIBIT_A_0100EXHIBIT_A_0101EXHIBIT_A_0102
Confidential Corporate Audit
Prefix: CONFIDENTIAL • Digits: 5 • Start: 1 • Separator: -
CONFIDENTIAL-00001CONFIDENTIAL-00002CONFIDENTIAL-00003
Compact Alphanumeric Index
Prefix: DOC • Digits: 4 • Start: 25 • Separator: none
DOC0025DOC0026DOC0027
Supported Bates Customization Features
- Custom Label Prefix: Define any alphanumeric text identifier such as
BATES,PLTF,DEF,CONFIDENTIAL, or case reference codes. - Custom Starting Number: Begin numbering at 1 or any custom integer (e.g. 1000) to resume an existing document production sequence.
- Configurable Zero-Padding: Pad numbers from 4 to 8 digits (e.g.,
0001to00000001) so every identifier maintains equal character width. - Flexible Delimiters / Separators: Choose hyphen (
-), underscore (_), space, or no separator between the prefix and number. - 6 Page Positions: Place numbers in the top-left, top-center, top-right, bottom-left, bottom-center, or bottom-right with custom edge margins in points.
- Typography & Color: Choose standard PDF fonts (Helvetica, Times Roman, Courier), adjustable point size (6 pt to 48 pt), and custom text colors.
- Multi-File Continuity: Upload multiple PDFs together to automatically continue sequential numbering across files without numbering gaps.
- Live Real-Time Preview: Live canvas preview reflects your exact font, size, position, margin, and color before generating the final document.
Privacy and 100% On-Device Processing
Legal discovery files, contracts, financial audits, and personal records often contain sensitive or confidential data that cannot be uploaded to third-party web servers. PDFZento performs Bates numbering entirely on-device inside your browser using WebAssembly and Web Workers. Your files are processed in local memory and are never uploaded, transmitted, or stored on external servers.
Frequently Asked Questions
What is Bates numbering in a PDF and what are Bates numbers?
Bates numbering is a sequential identification system used to label pages or documents with unique reference numbers, commonly for document organization, corporate records, and legal discovery. A Bates number typically includes a case or document prefix, a delimiter, and a zero-padded sequential numeric counter (such as CASE-000001). PDFZento applies Bates numbers as a clean vector text layer directly in your browser without altering your underlying document content.
How do I add Bates numbers to a PDF or Bates stamp a PDF?
To add Bates numbers or Bates stamp a PDF: (1) Upload one or more PDF files into the tool, (2) Configure your prefix, starting number, digit padding, separator, position, font, and color, (3) Verify the live first-page preview, and (4) Click "Process Bates Numbering PDF" to stamp the sequential identifiers and download the result immediately.
What is the difference between Bates numbering and regular page numbering?
Regular page numbering indicates internal page order inside a single document (e.g., "Page 1 of 10"). Bates numbering assigns unique, continuous sequential identifiers (e.g., "CASE-000145") across individual pages, multi-page documents, and entire document production sets, establishing a reliable reference index across files.
Can I choose the starting Bates number?
Yes. You can set the starting number to 1 or any custom integer (such as 1000 or 50000) to resume an existing document production sequence or align with an active case index.
Can I add a prefix and customize the Bates format?
Yes. You can enter any custom alphanumeric prefix (e.g., CASE, EXHIBIT, DISCOVERY, CONFIDENTIAL), configure zero-padding between 4 and 8 digits (e.g., 0001 to 00000001), and select a delimiter such as a hyphen (-), underscore (_), space, or no separator.
Can Bates numbering continue across multiple PDF documents?
Yes. When you upload multiple PDF files together, PDFZento automatically continues the sequential Bates sequence across all files in order without numbering gaps or manual re-entry.
Where can I position Bates stamps on the PDF pages?
You can select from 6 standard positions: Top Left, Top Center, Top Right, Bottom Left, Bottom Center, or Bottom Right. You can also customize edge margins in points and check the live canvas preview before exporting.
Is Bates stamping in PDFZento secure and confidential?
Yes. PDFZento operates 100% on-device using WebAssembly and Web Workers. Your files are processed entirely in your browser memory and are never uploaded to any remote server or third-party cloud.
Does Bates numbering modify or damage the original PDF text?
No. Bates numbers are stamped as a non-destructive vector text layer over each page. The underlying text, fonts, images, form fields, and vector graphics in your original document remain completely intact.