Boleto

All banks have information that is shared such as:

logo:Path with logo image. [default: Without logo]
carteira:Bank contracts.
dataVencimento:Date the bill expires.
dataDesconto:Maximum date for granting the discount. [default: dataVencimento]
dataDocumento:Bill date. [default: today]
dataProcessamento:
 Creation date bill. [default: today]
desconto:Bill discount amount.
valor:Bill amount.
multa:Percentage of fee to be charged (per month). [default: false]
juros:Percentage of interest to be charged (per month). [default: false]
jurosApos:How many days after expired will be charged the interest. [default: 0]
diasProtesto:How many days after expired will be protested. [default: 0]
numero:Bill number. (Will be used to generate the Nosso Número)
numeroDocumento:
 Your internal bill number.
numeroControle:Any control that you may have, the same one sent will be returned in Retorno
descricaoDemonstrativo:
 Texts that will be shown in the bill Demonostrativo field.
instrucoes:Texts that will be shown in the bill Instruções ao caixa field.
instrucoesImpressao:
 Texts that will be shown at the top of the bill with instructions for printing or anything else you want to communicate.
aceite:If the bill is accepted by the customer. [default: N]
especieDoc:Kind of bill. (Usually DM - Duplicata Mercantil) [default: DM]
pagador:The Pagador.
beneficiario:The Beneficiário

See also

API bill docs
Documentation for return objects.
Examples
Examples of use