In app popup. "Are you on the phone with Chase? We need to check it's you on the phone to us. Let us know it's you and enter your passcode on the next screen. @ Not you? Your details are safe. Just tap 'No, it's not me' and we'll end the call."
https://files.mastodon.social/media_attachments/files/112/372/406/504/640/952/original/e58813c2dc165422.png