The I Do Foundation makes it easy for couples and guests to donate to a charity of their choice. There are many ways to do this, but here are the top 2:
Instead of trinkets, mints or other small gifts for the guests, couples can instead choose a meaningful gift that is special to them. You can opt to honor a loved one or family member with a donation to their favorite charity or in their name. You can also have the donation go to a local charity in your community.
Select your charity and then place a card on each table telling guests of your donation.
Instead of guests buying you gifts, instead your guests can generously donate that money to a charity that you choose. Provide your guests a link through your wedding website telling guests of your preference or include the information in the invitation.
From I Do Foundation: "By incorporating charity into life celebrations, we help families establish a pattern of giving that will last a lifetime."