diff --git a/plugins/woocommerce/changelog/tweak-more-robust-oa-field-injection b/plugins/woocommerce/changelog/tweak-more-robust-oa-field-injection
new file mode 100644
index 00000000000..1c9e5a0b79b
--- /dev/null
+++ b/plugins/woocommerce/changelog/tweak-more-robust-oa-field-injection
@@ -0,0 +1,4 @@
+Significance: patch
+Type: update
+
+Inject order attribution checkout fields (only once) on a wider set of checkout form actions.
diff --git a/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php b/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
index c359696fe1f..9aa0f137e7a 100644
--- a/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
+++ b/plugins/woocommerce/src/Internal/Orders/OrderAttributionController.php
@@ -58,6 +58,13 @@ class OrderAttributionController implements RegisterHooksInterface {
 	 */
 	private $proxy;
 
+	/**
+	 *  Whether the `stamp_checkout_html_element` method has been called.
+	 *
+	 * @var bool
+	 */
+	private static $is_stamp_checkout_html_called = false;
+
 	/**
 	 * Initialization method.
 	 *
@@ -111,7 +118,27 @@ class OrderAttributionController implements RegisterHooksInterface {
 			}
 		);
 
-		add_action( 'woocommerce_checkout_after_customer_details', array( $this, 'stamp_html_element' ) );
+		/**
+		 * Filter set of actions used to stamp the unique checkout order attribution HTML container element.
+		 *
+		 * @since 9.0.0
+		 *
+		 * @param array $stamp_checkout_html_actions The set of actions used to stamp the unique checkout order attribution HTML container element.
+		 */
+		$stamp_checkout_html_actions = apply_filters(
+			'wc_order_attribution_stamp_checkout_html_actions',
+			array(
+				'woocommerce_checkout_billing',
+				'woocommerce_after_checkout_billing_form',
+				'woocommerce_checkout_shipping',
+				'woocommerce_after_order_notes',
+				'woocommerce_checkout_after_customer_details',
+			)
+		);
+		foreach ( $stamp_checkout_html_actions as $action ) {
+			add_action( $action, array( $this, 'stamp_checkout_html_element_once' ) );
+		}
+
 		add_action( 'woocommerce_register_form', array( $this, 'stamp_html_element' ) );
 
 		// Update order based on submitted fields.
@@ -339,8 +366,25 @@ class OrderAttributionController implements RegisterHooksInterface {
 	}
 
 	/**
-	 * Add `<wc-order-attribution-inputs>` element that contributes the order attribution values to the enclosing form.
-	 * Used for checkout & customer register forms.
+	 * Handles the `<wc-order-attribution-inputs>` element for checkout forms, ensuring that the field is only output once.
+	 *
+	 * @since 9.0.0
+	 *
+	 * @return void
+	 */
+	public function stamp_checkout_html_element_once() {
+		if ( self::$is_stamp_checkout_html_called ) {
+			return;
+		}
+		$this->stamp_html_element();
+		self::$is_stamp_checkout_html_called = true;
+	}
+
+	/**
+	 * Output `<wc-order-attribution-inputs>` element that contributes the order attribution values to the enclosing form.
+	 * Used customer register forms, and for checkout forms through `stamp_checkout_html_element()`.
+	 *
+	 * @return void
 	 */
 	public function stamp_html_element() {
 		printf( '<wc-order-attribution-inputs></wc-order-attribution-inputs>' );