Pilgrim Credencials (Kredenzjal tal-Pellegrin) are available from XirCammini. In the case of the Universal Peace Walk 1543AD, the Credencial is integrated in the pilgrim guidebook.
The walk is around 28km long and the Kredenzjal will serve as evidence of having walked the Universal Peace Walk 1543AD. A Testimonium (certificate) will be issued to persons who complete the Universal Peace Walk 1543AD after registering and collecting the guide-book and integrated Kredenzjal.
According to the Cathedral Chapter of Santiago De Compostela (December 22nd, 2016) The Compostela can be issued to pilgrims commencing from the port of A Coruna having made part of the Way in their country, then walking the distance from A Coruna to Santiago de Compostela. Therefore, the Universal Peace Walk 1543AD (28km) when combined to, for example, the Camino Ingles from A Coruna to Santiago de Compostela (75km), would serve to obtain the Compostela.
Historically the credencial was the equivalent of a ‘passport’ (hence the reason for it being sometimes referred to as a ‘pilgrim passport’). It was a document of ‘safe passage’ issued by a local government or ecclesiastical authority for persons travelling overseas. The record above is an early 17th century certificate of safe passage issued by Grandmaster Wignacourt to Don Juan Benegas who was travelling from Malta to visit holy shrines in Europe including Loreto, Rome and Santiago de Compostela.