Can you be asked to testify against yourself?
Under international law no one can force you to give information against yourself, even if you are suspected or charged with a very serious offence.
You have to be careful of what you say because this information may later be used in court against you. However, you have to give truthful information about your identity, such as your name and surname.
What human rights violation may there be?
If you are forced to speak against your will or testify against yourself, it may result in a violation of the right to fair trial. Read more about the right to remain silent.