He was elected to replace Arnulf, who had died in battle against the Córdobans, and his episcopate coincided with the renewed colonisation of the west of Catalonia.
This resulted in a major dispute between Vic and Elne, as Borrell tried to collect the tithes of Gurb and seized Berenguer's family's property.
The council, fooled by the forgeries claiming that the tithes of Gurb belonged to the cathedral of Vic, confirmed the false documents and excommunicated Berenguer.
[4] In 1015, Borrell installed Guillem de Mediona, already castellan of the frontier castle of Clariana, in the site of Calaf, with the condition that he build a fortress there.
[3] His successor, Oliba, convinced that the documents from the Gurb case were forged, reversed Borrell's decision on the tithes.