The property filter adds the possibility to select the properties for GET operations. Syntax: ?properties[]=<property>&properties[<relation>][]=<property> You can add as many properties as you need. The following example shows how to select paymentType and
issuer.rfc when fetching a list of invoices. 
  curl -i https://api.syntage.com/taxpayers/{id}/invoice?properties[]=paymentType&properties[issuer]=rfc