We also had the same issue on many sites of our clients and solved by adding the following CSS
div.wpcf7-response-output {
border: medium none;
}
Hi royho,
I asked Stripe support, they said “Yes, Stripe does support NAB issued cards. With Stripe, you can charge almost any kind of credit or debit card. For Australian, you can process any payments with Visa, MasterCard, or American Express.”