When you are processing a Batch Entries or Import Files you might get error message as below
This is because stripe has recently made some changes to their API wherein you have to enable the below setting when you send credit card numbers to their API.
Login to your Stripe account and go to Business settings | Integration | Advanced Settings. Enable Process payments unsafely.
Please note that the above changes are only required for Batch Entries or Import Files, normal checkout form uses the updated API and will not require any changes.
Stripe allowed users that registered before 2017 to continue using the API without throwing this security issue. Only newly registered users get this warning so they may be able conceive the payment differently using the new token mechanism released in April 2019