I'm pretty sure that the text on the Card Verification page used to explain that an Authorisation Request would be made against the card account. That seems to have vanished.
This could now lead to confusion/consternation when users suddenly see what looks like a debit against their account or their bank queries the transaction with them (as some do).
Could it be made clear that such a transaction may appear on the user's account and that it is to be expected and nothing to worry about?
Something along the lines of:
Your card will now be verified by means of a test authorisation for a small amount; no money will be actually debited from your account . The amount may show as a pending transaction against your account but will soon disappear.