AutoFill for credit cards must be disabled.
Enabling Google Chrome's AutoFill feature allows users to auto complete credit card information in web forms using previously stored information.
If this setting is disabled, Autofill will never suggest or fill credit card information, nor will it save additional credit card information that the user might submit while browsing the web.
If this setting is enabled or has no value, the user will be able to control Autofill for credit cards in the UI.
How this relates to the STIG checklist: STIG vs SCAP benchmark.