I appreciate both responses, but neither address my actual question. I'm trying to learn if having my card already in my Apple Wallet would have triggered an alert somewhere between Apple and card issuer when it was added to someone else's Apple Wallet.
Backstory: I was informed of a fraudulent purchase by the card issuer, which I confirmed was not me, and spoke immediately with their fraud detection department. Having my card in my possession, this was a bit of a surprise. They looked and could see (somehow) the charge was conducted in person in store via Apple Wallet. This was another surprise - how did someone add my card to their Apple Wallet? Hence my question - if I had already put the card in my own Apple Wallet, would its add to a different device have set off more bells? I received no notification when the card was added, not by Apple and not by my card issuer. I have all cards in my possession. The fraud agent said a "scan" can occur "in seconds" adding to the Apple Wallet. Yet when I do it, I have to confirm and confirm again. Somewhere there's a hole in the system and I'm trying to figure out how to make sure it does not happen again.
I don't understand what the card issuer verifies with Apple when the card is added to the wallet - of all the data both corporations have at that moment, why isn't a simple name check conducted? I can't even sign into this community without Apple requiring a verification code sent to a device and entered on screen, why the heck isn't there a two-step authorization required when adding a card to your Apple Wallet, especially if they all know some sort of scan can happen 'in seconds' that can add your card to anyone's Apple Wallet without setting off the alarms?
And for the record, perhaps I'm on the right track about adding it to your own Apple Wallet first - when I got my new card's numbers I added it (manually, of course, the physical cards are still en route) to my Apple Wallet. I next added the card to my spouse's iPhone, and good god, I'm surprised you didn't see it on the news - my home phone rang, I had a text and an urgent email, all from my credit card issuer wanting to confirm the add was legit. Want to know how to stump a Fraud agent? Ask them why they didn't do that when someone not named me added it to their device the day before...
Thanks for the good but (in my case) unnecessary advice.
I'd still love someone who might know something under the covers to give us their take on how this happens and if having the card already in your Wallet helps to trigger alarms when someone not you adds to their wallet. I think everyone who, like me, has hesitated to add their cards to their wallets would appreciate knowing if it actually adds security.