Galp energy customers were faced with large bills after months without invoicing — disruptions have been occurring since September and some bills exceed €500, according to Jornal de Negócios. The Energy Services Regulatory Authority (Entidade Reguladora dos Serviços Energéticos, ERSE) reports receiving 80 complaints on the matter and stresses that the company is obliged to agree payment plans with affected customers and may have to provide compensation.