Earlier quoted context omitted.
Credit cards generally verify in seconds, so this is a significant difference, even if the time is hours (I'd read somewhere it could be days for 7 confirmations, but thanks for the correction if that is never true and it is hours) - that confirmation time varies wildly and is not predictable is also an issue. A lot of merchants ship almost immediately after orders are completed (e.g. digital goods), so introducing a…
> Credit cards generally verify in seconds, so this is a significant difference Which is equivalent to a 0 confirmation transaction, so no it's not a difference. Cards can be reversed for months, that's what 6 confirmations is competing with.
The CC issuer is queried for the card status, funds available, address etc, and transactions are accepted or declined based on that information. Sometimes there's even an extra verification step directly contacting the issuers bank to check a passcode (SecureCode), and all that is reversible afterward if a mistake or fraud is detected.
In what way is that analogous to a 0 confirmation irreversible bitcoin transaction?