UID-Nr/tax numbers from personal accounts - check if number is unique
(available from V6.4.738)

Basic data -> company index -> div. parameters

On this screen you can activate the check, if the following numbers are unique or not:

- UID number
- tax number
- tax number 2

For example:
You activate this option for the field "UID number". Now you create a new or modify an existing debitor/creditor and enter exactly the same UID number into the field "UID number" from another personal account. The program will show you an information message, that this UID number is used on another personal account. (But you can save the data anyway!)