Weddingbee boards

My wedding was last month.  We are an interfaith couple and basically had a civil ceremony (I'm Christian, he's Jewish).  We wrote our own ceremony and included certain elements from our faiths.  My husband and I signed a ketubah as part of our ceremony.  Then his brothers put it somewhere out of the way.... after the wedding we realized that no one else signed it!  Our entire bridal party, including our parents and the officiant live in different states.  Now what do I do? 

It sounds like the officiant was not a rabbi, right?  I mean... I can't really see there being an actual halakhic answer (ie, an answer in accordance with Jewish law) to this because of the situation but if you were married by a rabbi, I would ask them.  If you weren't married by a rabbi, I would find a Reform rabbi and ask them.

Normally the ketubah outlines conditions that the groom (and sometimes the bride) agree to for the marriage--traditionally it outlines the dowry, the provisions that the groom will provide to the bride during their marriage, etc.. the people that sign do so because they are witnessing the acceptance of these conditions--like getting something notarized, I suppose! It is also important that these witnesses see the ring given to the bride (or the exchange of rings in the case of egal weddings) during the ceremony too.  Some ketubot are signed by the bride and groom and even the rabbi but that is completely optional--minimally you need two witnesses and they can't be you two.

Now....that's the traditional Jewish background.  This being an intermarriage, I really don't know what you should do.  That's why I'd consult a rabbi that will be receptive to your situation. :)