1. Select the relevant record line(s) and push the button ‘More > Import into address book’.
2. Confirm with a click on ‘Yes’.
Do you still receive the same error message?
In that case the mandate ID is probably already in use by another person in your address book.
Click on 'File > Mandates' to verify this. If you do not want to maintain an address book, you can disable validation by deselecting the checkbox ‘Strict validation using address book’ (please note: this is not recommended).
2. Confirm with a click on ‘Yes’.
Do you still receive the same error message?
In that case the mandate ID is probably already in use by another person in your address book.
Click on 'File > Mandates' to verify this. If you do not want to maintain an address book, you can disable validation by deselecting the checkbox ‘Strict validation using address book’ (please note: this is not recommended).