The imposition of the Christian tax regime on the Muslims of the Ebro entailed much more than the mere redirection of taxes to a foreign fisc; the two systems were ideologically and practically distinct, and what had been a personal and quasi-religious obligation under Islam was converted into a communal and secular affair. The concepts which Christian practice brought included distinct categories of tax-payers, multiple tax jurisdictions, and personal or institutional privileges of exemption (franquitas). The last of these caused particular stresses, sowing conflict among aljama members and cementing bridges of interest between Muslim and Christian parties. A textbook case of what must have been a quite typical conflict is that of the Galip family of Zaragoza.

This family can be traced back to at least 1179, when Alfons I granted a certain “Galibh” of Zaragoza to the Temple, and next appears in 1278, in Pere II's extraordinary levy on the franci Muslims of the city. Here, the Templar vassal “Jucef de Galip” is assessed at 400 solidi, revealing him as the head of one of the city's wealthiest Muslim families. By this time, tensions were building between the wealthy franci and the majority of the aljama's inhabitants, who received a charter in 1284 confirming their right to levy royal taxes on this group. For their part, the franci were determined to avoid paying and were aided in this by ambiguities in the definition of franquitas.