Some Associations don't accept Amex or Discover Card. This customization gets overwritten with each roll-out, so I've detailed the steps below.
1. Go to Settings -> Customizations -> Customize the System
2. Click Entities -> Payments -> Fields -> cobalt-creditcardtype
3. Select and remove the Credit Card Types from the value-list then click Save-And-Close.
Click Publish All Customizations.
