IMHO, eliminating any potential source of confusion from a checkout flow is worth doing, and so masking the domain is usually worth it. And although we know it

IMHO, eliminating any potential source of confusion from a checkout flow is worth doing, and so masking the domain is usually worth it. And although we know it doesn't make a difference in practice, customers and clients don't like it. Your point about SSL and mitm makes sense. I'll look into the idea of temporarily storing the data in hidden fields, and if I find anything definitive I'll be sure to update. Thanks for the followups, I greatly appreciate your help. If I have further questions I will email you.