A
Fisterana, a certificate of completion, is issued by the Concello de Fisterra and is available from the Municipal Albergue. A
Credencial dedicated to the Camino Fisterra is available from the Galician Tourist Office in Rua Vilar in Santiago. Make sure you get a minimum of two stamps per day. If you walk on to Muxia via Lires (get a stamp) you can also claim a
Muxiana. Neither will get you out of Purgatory but they look pretty on my study wall
Edit: I believe that if you walk the entire Santiago / Fisterra / Muxia / Santiago triangle you will be able to request a Compostella as you would have walked more than 100K
to Santiago. But you might want to check that one out with the Pilgrims' Office.