Addressing thank you cards.

I'd just to who showed up and probably separate cards.

I would just write it to the person who came to the shower. As for the mother daughter duos, I would probably do separate cards for each of them unless they live together.

I'd do separate cards for everyone and give to all who showed up

I did it depending on how they wrote on the card. If they said "love so and so and family", I wrote it to the family, if they just had their name, I wrote it just to them.

I agree with Brae, if the card says from the family address it to the family.

I just addressed mine to the person that showed up & gave the gift. I would write two thank you cards for combined gifts, one to mother and one to daughter.

Write it to whoever's name(s) are on the card. For example, my mom always writes her and my dad’s name on cards, even if she only goes to the party. You could then mention you appreciate whoever’s presence that was there. If it’s a mother/daughter group gift (for example), you write a “thank you” note to both mother and daughter, even if they live at different homes.