To prevent adding 3rd-party tokens to the CA app, you can set the reject3rdPartyChargeCards value to true in the app’s subscription.
When this value is set to false, the mobile app accepts all tokens with both types of ownership (owned and not-owned). This feature was implemented with the ChargeAssist app in mind, specifically to prevent accepting tokens belonging to 3rd-party eMSP Roaming Partners of GreenFlux. However, it may not be sufficient for White Label apps.
How to enable or disable it? You can enable or disable this feature via the subscription management endpoints in the CA Admin API. Setting the value to true prevents adding 3rd-party tokens. If it’s set to false or the property does not exist, then all tokens will be accepted.
Effects on the users If this setting is enabled, when a user tries to add an external token in the ChargeAssist App, the request is rejected and an error message is displayed.