If you change your Member Card (due to, for example, a lost card), Parama Member Support will use a migration tool so there will be no impact to you when they get a new card.
Each Increased Authentication enrollment is linked to one Member Card. If a member has multiple Member Card numbers with unique logins, they must register for Increased Authentication with each Member Card.
There is no limitation on sending verification messages internationally to mobile phones under Two-Step Verification. Members should receive their SMS texts while travelling if their mobile phone plan provides international roaming and they are in an area with good mobile service.