How to collect signatures in WordPress forms

Decide whether you need a simple drawn acknowledgement or a more formal signing workflow. Include the signer’s name, email address, the agreement or consent text, and the submission date alongside the signature.

A drawn signature image is not automatically the same as a complete electronic-signature audit trail. If the document has legal, financial, medical, or regulatory importance, confirm the record-keeping requirements before relying on a WordPress form.

Look through your form builder’s available fields or add-ons for a signature field. WordPress itself does not provide a signature control in the block editor, so your current form plugin must either support signatures or allow custom fields and code.

If there is no signature field, the manual route requires an HTML5 canvas, JavaScript that accepts mouse and touch input, a hidden form value containing the image data, server-side conversion and storage, and validation to stop empty submissions. That is possible, but it is the part most likely to break during theme, caching, or mobile changes. A typical custom implementation converts the canvas to a PNG data string before submission.

For the faster route, install and activate a signature extension that matches your form builder. With Gravity Forms, the Signature Add-On adds a Signature field to the Advanced Fields toolbox. The add-on requires the server’s PHP GD library because it creates the signature image on the server.

After activation, open the form you want to edit and confirm that the Signature field is available before changing the live form.

Open the form editor, drag the Signature field into the agreement or approval section, and give it a clear label such as Signature or Authorised signature. Set the field as required if a submission must not proceed without a signature.

Adjust the pad’s background, border, pen colour, size, and width so it is easy to use. Gravity Forms stores the captured signature as a PNG image and displays it in the entry details.

Place the agreement text and a required consent checkbox next to the signature field. Do not rely on the image alone to show what the signer accepted. Keep the signer’s name, email, form version, and any relevant reference number in the same entry.

Configure the notification so the recipient can identify the submission. In Gravity Forms, the signature thumbnail is included with the {all_fields} merge tag, and you can insert the individual signature image in an HTML notification with its field merge tag.

Submit test entries from a desktop mouse, an Android phone, and an iPhone or iPad. Check that the signature is visible in the entry, appears in the notification when intended, and remains available after refreshing the confirmation page.

Common failures include a canvas that becomes offset after responsive CSS resizes it, a mobile pad that will not accept input, and a signature that looks present but is not copied into the submitted field. Avoid forcing the pad’s width with custom CSS unless you also handle canvas resizing; support threads regularly report drawing offsets after responsive styling. Also check that the GD library is enabled and that caching or optimisation tools are not delaying the field’s scripts.