Can the primary card receive the verification code of the secondary card?

Of course. The main card and the auxiliary card are independent accounts, and each account has its own mobile phone number and verification code receiving method. Some banks or payment platforms will provide a special function to enable the primary card to receive the verification code of the secondary card. In this special case, the main card will have multiple bound mobile phone numbers, one of which is used to receive the verification code of the secondary card, so that when the secondary card performs an operation requiring verification code, the verification code will be sent to the mobile phone number bound to the main card.