That's easy - if they pay on a desktop then depending on which browser they're using it may show Credit Card as an option to pay (with an option to save their card for future payments), as well as either Google Pay or Apple Pay.
For example, the Safari Browser is made by Apple, so that one will usually show Apple Pay as an option. Similarly, if they check the digital invoice on a phone, if it's an iPhone then the default internet browser is Mobile Safari, which means they'll see both the credit card field and the Apple Pay option. Also - the credit card field is usually very sleek and looks like one field now. So it's the 16-digits then within the same field (to the right above half a centimeter) is the expiration, 3-digit code - and I'm pretty sure (if memory serves me correctly) that the zip code field is the last field over to the far right. The single input field expands as you put the cursor or your finger in the different areas of it.
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