}else{
Registration registration = system.getRegistrations ().get(idRegistration);
if(registration == null || registration.getParcel(parcelId) == null){
paymentType = system.getPaymentMoney();
}else{
Parcel parcel = registration.getParcel(parcelId);
paymentType = parcel.getPayment();
}
}
if (this.discount != 0) {
operation = new Operation(id, system.getAccounts().get(accountId), categoryId, gdDate, description, value, paymentType, _receivedValue, discount);