The 'Credit Card Number' Field Must Allow and Auto-Format Spaces (80% Don't) – Articles – Baymard Institute

Despite 5% of users abandoning checkouts due to credit card validation errors, 80% websites don't actively aid their users in typing and validating the 16-digit card number by auto-formatting it with spaces

234 'Stored Credit Cards' Design Examples – Baymard Institute

5 'Credit Card Form' Implementations That Make 'L.L. Bean' Best-in

5 'Credit Card Form' Implementations That Make 'L.L. Bean' Best-in

64 Cart & Checkout UX Articles – Baymard Institute

234 'Stored Credit Cards' Design Examples – Baymard Institute

E-Commerce Checkouts Need to Mark Both Required Fields and

234 'Stored Credit Cards' Design Examples – Baymard Institute

8 Recommendations for Creating Effective Input Fields – Baymard

Baymard Institute on LinkedIn: Format the “Expiration Date” Fields

How to design a credit card form for an online store?