One collage is retained to be part of the permanent collection of the International Museum of Collage, Assemblage and Construction, while remaining permanently on exhibition on the Museum's Internet site and possibly exhibited in future exhibitions held by the Museum. (feel free to include extra works for the permanent collection)
The other 12 are distributed into parcels which are sent back to each contributing artist. So you send 13 of yours, get back 12 of other participants. No returns. No jury. No entry fee.

Details:

IMCAC - Collage Exchange
6955 Pinon St
Fort Worth TX 76116

http://collagemuseum.com/collage-exchange-index.html