credencial

not sure I understand what you want. If you are planning on walking back to Lourdes as well and want a clean credencial for the albergues, just take two.

Credential

Hola,
If you join a camino organisation you can get a credential ahead of time.
Not sure where you are so here are some links:

American Pilgrims on the Camino: http://www.americanpilgrims.com/
Canada: The Little Company of Pilgrims: http://www.santiago.ca/
Dutch: http://home.wanadoo.nl/petermkuiper/camino/
England: Confraternity of St James: http://www.csj.org.uk
France: Société des Amis de Saint Jacques de Compostelle: http://www.compostelle.asso.fr/
France – Vezelay: "Via Lemovicensis" (La Voie de Vézelay): http://www.amis-saint-jacques-de-compostelle.asso.fr/
Southern France: Association de Coopération Interrégionale les Chemins de Saint-Jacques-de-Compostelle http://www.chemins-compostelle.com/
France – Chartres: Association des Amis de Saint Jacques d'Eure et Loire http://monsite.wanadoo.fr/chartres_stja ... ndex.jhtml
France - Saint Jean: Au coeur du chemin - les Amis de Chemin de St Jacques des Pyrénées Atlantiques http://www.aucoeurduchemin.org/
German: Pilgern Auf Dem Jakobsweg http://www.pilgern.ch/
Ireland: The Irish Society of the Friends of St James http://www.stjamesirl.com/
Norway: The Confraternity of St James, Norway http://www.pilegrim.no/
Portuguese: Caminho de Santiago http://www.caminhodesantiago.com.br/index.htm

Good luck!

Sil