Is it considered forbidden (haram) to obtain a national ID card if the appointment date for it was falsified, and is it forbidden to use it, knowing that the card itself is not falsified?

The librarian erred by changing the appointment date, as this involves lying and encroaching upon the rights of the applicants. The questioner should have forbidden him from this action and advised him to be truthful. There is no blame upon the questioner for using the card he obtained, as it is valid and he has the right to possess it.