In 2007, GlobalGiving put in place what is perhaps the first philanthropic guarantee. If any donor is not satisfied with her donation for any reason, we will refund her money in the form of a voucher that can be used on any other project on the site. This guarantee is highly unusual in this sector, where donors have often been kept at arm's length. It reflects how strongly we feel about the donor experience on GlobalGiving.
Today, The Week magazine announced it is guaranteeing to its advertisers that readers will remember their ads more than they remember ads in other magazines. I like the Week (especially the print version) because they are innovating the presentation and trying to make the magazine enjoyable and "sticky" even while the content is serious.