Bem interessante o projeto do fotógrafo.
Na FAQ da página dele, dá a entender que a pessoa já conhece o seu sósia, mas ele que entra em contato e incentiva a participar do projeto.
"Q: Am I responsible for contacting my look-alike and encouraging them to participate in the project ?
A: No, we take responsibility for communicating with the look-alikes and explaining the role of the participant. Involvement in the project is completely voluntary. If one look-alike decides not to participate we respect their decision. The project depends on the mutual cooperation of the look-alikes."
Fonte: http://francoisbrunelle.com/index.php?id=67&lang=en