NoahFace can be used with a 3rd party access card reader (or RFID/proximity card reader) to identify users.
Card Numbers are usually numeric and are often printed on access cards. When you allocate a card to an employee, you should update the Card Number on their user record, either in your HR/Payroll platform (assuming you are synchronizing users), or directly in the NoahFace Dashboard.
You can maintain Badge IDs for employees in Workday as Other IDs:

You can sync Badge IDs to NoahFace by specifying your Other ID Type in the Card Number field of your synchronization:

You can maintain Badge Numbers for employee in Dayforce under Work / Badge:

Employee Badge Numbers are automatically synchronised to the Card Number field in NoahFace.
You can maintain Badge Numbers for employees in UKG Pro Workforce Management (formerly UKG Dimensions) under Device Information:

Employee Badge Numbers are automatically synchronised to the Card Number field in NoahFace.
To enable access card reading, simply edit your Access Rule, select "Access Card" as the Identification Required, and disable Registration Permitted:

If a card is read but no matching employee is found, the NoahFace App can be configured to display feedback as follows:

To enable this feedback you specify the "cardnotfound=true" option in your Access Point Type Screen Details.
The name for a card is "Card" by default, but can be changed by specifying the "card" option (eg: card=Badge).
To configure the feedback message you can specify the "notfoundmsg" option. The strings "#NAME" and "#NUMBER" in this message will be replaced with the card name and the card number respectively.
Not found messages require version 26.16 or later of the NoahFace App.
You can use a number of access card readers with NoahFace, as described below:
The SerialIO idChamp NF4 connects to your iPad via Bluetooth and acts as an iPadOS keyboard.

SerialIO readers can be purchased in one of two modes as follows:
Smart Mode readers are simpler to purchase, setup, and install and are generally recommended for small installations. Direct Mode readers are more robust and are generally recommended for large enterprise installations.
The list of card types that can be read by these card readers can be found here: Card Types Supported by the idChamp NF4
More information can be found here: https://buy.serialio.com/products/idchamp%C2%AE-nf4x-wireless-smart-card-reader
If you are using a Smart Mode reader, install the App Serial Magic Keys and connect the device under Devices:

From the Device Manager Cog, make sure Reconnect last devices is enabled as follows:

From the Device Cog, make sure Append to scan is set to "Return" and Hidden keyboard is enabled as follows:

Under iPadOS Settings, select General / Keyboards, add a Serial MagicKeys keyboard, and enable Allow Full Access. Also delete your existing virtual keyboard so that it cannot be used to enter card numbers.
The Socket Mobile SocketScan S550 reader connects to your iPad via Bluetooth and acts as an iPadOS keyboard.

More information can be found here: https://www.socketmobile.com/au/products/s550
The HID Omnikey 5427CK card readers connect to your iPad via USB and act as an external keyboard.

You will also need a USB Adaptor (there are both Apple and 3rd party versions of these adaptors) so you can keep your iPad permanently charged while the reader is connected to your iPad.
It is also recommended that you delete your virtual keyboard so it cannot be used to enter card numbers.
To do this, install any 3rd party keyboard emulator (eg: Serial Magic Keys) and use it to add a second keyboard. Once you have added a second keyboard, you can delete your virtual keyboard.
More information can be found here: https://www.hidglobal.com/products/omnikey-5427ck
The FissaiD card readers connect to your iPad via USB and act as an external keyboard.

There are multiple models of the FissaiD card readers (for different types of cards), so if you have existing access cards, make sure you purchase a reader that is compatible with them.
You will also need a USB Adaptor (there are both Apple and 3rd party versions of these adaptors) so you can keep your iPad permanently charged while the reader is connected to your iPad.
It is also recommended that you delete your virtual keyboard so it cannot be used to enter card numbers.
To do this, install any 3rd party keyboard emulator (eg: Serial Magic Keys) and use it to add a second keyboard. Once you have added a second keyboard, you can delete your virtual keyboard.