Having a numbering for a specific account is also possible with Brazilian boleto system, but it is common only for credit cards, which can be paid at any time a

Having a numbering for a specific account is also possible with Brazilian boleto system, but it is common only for credit cards, which can be paid at any time and at a wide range of values. Gas and phone codes are always bill-specific. However, if you pay a boleto like this twice, the provider will be informed and generally will give you the chargeback in the next bill. I have already used this as a trick to pay a bill when I was travelling and wouldn't get the most recent bill.