try pay the electricity "potencia" upgrade bill with Portuguese MultiBanco bank transfer system, but the "reference number is invalid" so call Portugal electricity network operator and they say we need to always wait 24 to 48 hours for the reference number to processed by the banks, so we should not pay bills immediately in Portugal because as the woman says "you pay the bill too fast, it is better to wait" #onlyinportugal portugalstory.co/p/you-pay-th…