How to Add a Signature Block to a PDF

A signature block is the structured space at the end of a contract where each party signs, prints their name, dates the signature, and optionally adds their title and company. Here is how to add one to any PDF in under two minutes, without opening Word, Acrobat Pro, or any other desktop tool.

Anatomy of a Signature Block

A complete commercial signature block typically contains:

• Signature field: ~50-60mm wide, 20-25mm tall. Large enough to accommodate a comfortable handwritten or typed signature.
• Printed name: Clearly identifies the signer beneath the signature.
• Date: When the signature was applied. ISO format (YYYY-MM-DD) avoids dd/mm vs mm/dd confusion.
• Title: The signer's role (Director, CEO, Partner, Managing Director). Omit for individuals signing personally.
• Company: Entity name the signer represents. Omit for individuals.
• ABN or company number (optional): For AU business-to-business contracts, some lawyers include ABN in the signature block for clarity.

Step-by-Step: Add a Signature Block in SignBolt

1. Open SignBolt and upload your PDF.
2. Navigate to the page where the signature block should go (usually the last page).
3. Click "Add Field" and choose Signature. A resizable field appears — drag it to where the block starts.
4. Click Add Field again, choose Printed Name, place it beneath the signature.
5. Click Add Field, choose Date, place it beside or below the printed name.
6. If the signer is corporate: add Title and Company fields.
7. If there's a counterparty: repeat the block on the other side (or below) for the second signer.
8. If sending for signature: save as template for reuse. The block is positioned once, used forever.

Example Block for an AU Commercial Contract

A typical block for a two-party commercial contract (example format):

SIGNED for and on behalf of                 SIGNED for and on behalf of
ACME PTY LTD (ABN 12 345 678 901)           WIDGETS PTY LTD (ABN 98 765 432 109)

[Signature field]                           [Signature field]

________________________                    ________________________
Printed name                                Printed name

________________________                    ________________________
Title                                        Title

________________________                    ________________________
Date                                        Date

Using Pre-Built Template Blocks

SignBolt's template library (NDA, lease, employment offer, freelance contract, consulting agreement, invoice) includes properly formatted signature blocks by default. If you are starting from scratch, these templates are a time-saver — use them directly or copy their block layout into your own documents. See all templates.

Common Mistakes

• Signature field too small. Signers then squeeze their signature in, which looks bad. Use 50mm+ width.
• Missing date field. Without a date, reconstructing when the contract came into force is harder.
• Single block for multi-party contracts. Each party gets their own block so there is space and clarity.
• Signature block on page 1 instead of the last page. Conventional position is the end of operative clauses. Anything else confuses readers.
• Block overlapping contract text. Leave whitespace around the block — 15mm on all sides minimum.

Initials vs Full Signatures

Long commercial contracts often require initials at the top or bottom of each page to prevent substitution of pages after signing. SignBolt supports initial fields as a separate field type — place one on each page, the signer initials each during the signing flow, and the final PDF has initials embedded as native PDF objects (not image overlays).

Witness Signatures

Some Australian deeds require witness signatures. The block should include a dedicated witness section separate from the signer blocks, typically containing: witness signature, witness printed name, witness address, witness occupation. For deed execution, verify the current state-specific witnessing requirements before relying on e-signature alone.

Related Reading

See professional digital signature guide, signing order setup, template library.

Frequently Asked Questions