Always in need of funds, Charles could not cancel the , although it was the most unpopular tax in the Regno. Instead he granted exemptions to individuals and communities, especially to the French and Provençal colonists, which increased the burden on those who did not enjoy such privileges. The yearly, or occasionally more frequent, obligatory exchange of the the coins almost exclusively used in local transactionswas also an important, and unpopular, source of revenue for the royal treasury. Charles took out forced loans whenever he needed "immediately a large sum of money for certain arduous and pressing business", as he explained in one of his decrees.