The first name option is for addressing your recipient on the envelope.
This Option 1 is also used on the reply page.
Option 2 is a special option if you choose to additionally address your recipient on your card or cards if you are sending multiple cards.
If you choose to additionally address your recipients on your cards, but do not fill out the 2nd name option - then Option 1 will also be used to address your recipients on the card(s).
The idea here to be offer our customers the possibility to formally address recipients on the envelope and to personalize the cards with additional addressing.
A envelope can be e.g.: Mr. and Mrs. Chapman
A card can be e.g.: Sarah and John or Dear Sarah and John,