How will the fiscal receipts with Customer ID be recorded in the new fiscalization model in Serbia?

When recording fiscal receipts following the new Law on Fiscalization, in certain situations, customer identification is provided. This identification is done using the field "Customer's personal identification number" in which a unique identification number is entered, which can be a tax or any other identification card according to the codebook. So, let’s find out how is the recording of fiscal receipts with Customer ID done in certain situations.