File Boleto for Customers - Brazil ( retorno file)

Hello guys

I've one question about the boleto file in Brazil

I've made the custo for the file retorno, and it works perfectly.

Now i have more 2 codes that the user told me that appeared in the retorno file.

One of the codes is 12

This code is related with discounts in invoices for customers.

I don't know excatly which are the parameters for the custo for this new code 12 ( Citibank code for customer boleto - Discount Invoices)

My problem is which parameter i need to use in this link:

Financial Accounting (New) - Bank Accounting - Business transactions-Payment transactions- Electronic bank statements-

Make global Settings for Electronic bank statements

After i select my chart of accounts and the my Bank transaction Type.

Then i need to assign my external transaction and here i have one question.

The fields that i need to fill are:

External Transaction: I will put the external bank code for boleto discount - 12

+/- : I wll add +

Posting Rule: I defined my posting Rule B02D

Interpretation Alghoritm: here is my problem, i don't know if i can add the option - 0000 No Interpretation or if i need to select another option , as 20 020 - Document Number search or 30 030 - Brazilian Search BELNR; GJAHR and BUZEI)

Note: I have the code 14 - Change due date of boleto customer. I've add the option 0000 - No interpretation but i don't know if is correct

Could you help me in this issue

Many thanks

Joao Simoes