Mac, I think you mean Credential, rather than Compostela.
Thanks guys! Now a little confused though haha! So the compostela is the credential at the end of the walk? lol Ok I think I may have a little bit of miss information, I thought the compostela was a sort of passpost thing that you took with you to get stamped along the way to show that you had been, where you have been....any insight into this? Also may be a silly question, but do I have to show some sort of camino "ID" to be able to stay at the alberques....