It is wise to be vigilant when using your credit card to pay online. Check that the website is using a secure connection using SSL, you can use this handy resource to check that for any website, just copy and paste the address of the website in to the form shown here: https://www.hubspot.com/ssl-checker
Of course we at Newlife use SSL and also use Stripe as our credit card processor.
Stripe has been audited by a PCI-certified auditor and is certified to PCI Service Provider Level 1. This is the most stringent level of certification available in the payments industry. To accomplish this, we use the best-in-class security tools and practices to maintain a high level of security at Stripe.
You can read more about Stripe security shown here: https://stripe.com/docs/security/stripe
As a Limerick based organisation we are really keeping it local as our web developers, AOS Web Services, are based in Limerick, and also Stripe was famously founded by two Limerick brothers, Patrick and John Collison. You might be interested in reading about the amazing success of the Collison brothers here.