Use the signature field in order to capture the App users' signature.

Our signature field allows for the capturing of signatures on a device in one of two ways.
Example Scenario
The delivery of a package needs to be signed off on by a courier and a receiver.
This checkbox option allows signatures from other persons to be captured on their own devices through scanning a QR code that displays in this field. The signature is then downloaded by the app user during form entry.

Launch the mobile client app and the respective form with the Signature field added, and when ready to capture a Contactless signature, simply:

Yes, it's that simple! But, this one "simple" feature has the potential to prevent complications that could arise from multiple users being in contact with the same device, allowing you to go Contactless.
Button options available:

Layout & Styling
This drop-down determines how this field is shown on the screen.

The color chosen in the hex code field here will apply to the field. The Transparent box can also be chosen instead for making this transparent instead of a solid color.

This is the color for the user's signature. By default, the color is black.

Checking this box will enforce validation against this field to make the field required, disallowing the user from progressing to the next page or submitting the form if it is left blank. If the user tries, they will be prompted with an error to return to the field and enter a value. When this validation occurs is determined by the "Validation Property" chosen on the page level; please see this article for more detail on this.

This property can also be made conditional based on a formula. To enable this, click "add condition" below the checkbox and enter a formula into the field that populates. The formula serves as the basic of the required-ness of this field.

Please see this article for more information on conditionally-required fields.
The contents of this field will determine whether the field will be visible to the user. For more detail on visibility rules, please see this article.

If this checkbox is checked, users will be able to see the contents of the field but will be unable to make edits.

Similar to the Required property, the Read Only property also includes the ability to define a conditional formula determining whether the read-only property is enabled. Click "add condition" to define such a formula.

Add your own custom formula to this property for validating text entered into this field by users. The formula is only applied when the field has an answer. Enforcement will be done according to the "Validation Property" chosen on the page level; please see this article for more detail on this.

The contents of this property will serve as a custom message to display to the user if their input fails validation.

The value entered in this property serves as the initial value of the field prior to manual input.

This property allows for the binding of the contents of the field to a data source that is linked to either a choices field or data field on the form. For details, please see the screenshot below:

Data Source binding allows you to create forms that can load data from, and update data to, any given data source. This opens up amazing opportunities to have dynamic data that is updated on the move (e.g., adding contacts or clients). For more information, please see this article.
Global Values are a local key/value store that is available to any Screen on the app. Use this property to allow the user to view and save defaults for use across the app (e.g., a default project or customer). Please see this article for more information.

How to Scan a QR Code
Most smartphones have the ability to identify a QR code using the device's default camera and prompt the user for what action to take. Alternatively, in respective app stores, there are numerous QR scanner apps to choose from which will do the job.
Android
A built-in QR code scanner on some Android devices is accessible by launching the default camera or Google Lens.
iOS
The iOS camera app is able to identify a QR code and prompt a user for what action to take.