I walked Porto to Santiago last year in May/June. I am planning for another trip, first time on
Camino Frances (starting in SJPP), late in May this year. Can I reuse my stamped pilgrim passport as I have plenty space on my 2017 one? Thank you!
Maybe, but probably it would be best not to IMO.
Symbolically, you finished your previous Camino, and this is a new one, so it would be I think preferable to start with a new
credencial
A
credencial is also more than just a little booklet to put stamps in along the Way, it's actually your passport and travel document for the purposes of your pilgrimage, for your way there and your way back -- so that technically, its validity may only cover one pilgrimage -- though that might involve several stages over several years using the same
credencial, and someone could undoubtedly re-use his
credencial to return in a following year to do a "reverse Camino", as it would still technically be the same pilgrimage. Yours however is a new pilgrimage.
Finally, it might be worth considering that a
credencial is actually a Church document, so that its usage is likely governed by the Canon Law and the local diocesan decisions as well as by the civil jurisdiction and laws and the internal rules and regulations of the Camino infrastructures themselves. But it would be wisest IMO to treat the question of whether a new
credencial is needed, or to keep on using an old one, as a religious question to be answered from a religious point of view. But I don't think you could re-use an old marriage certificate, or re-use a child's baptism certificate for a second child. So I'd say, don't re-use your
credencial.