He studied in an institute by means of a trick; should he work in the profession that he has learned?
Question

                I entered a professional institute which only requires a high
    school certificate (secondary education). I have a diploma from
    the same government foundation to which this institute belongs,
    but they won't accept you if you have any certificate higher
    than the general high school certificate. So I did not tell
    them that I have a diploma and I gave them the high school
    certificate only. They accepted me and I studied with them and
    learned a profession, but after that I regretted it and
    repented and I graduated from this institute but I did not take
    the certificate from them. Is it permissible for me to practice
    this profession that I have learned with them, or is it haraam
    for me to practice this profession because I learned it by
    means of a trick?.
Praise be to Allah.
      It is not permissible to use
      tricks in order to study in these institutes and go against
      the conditions that they have set out, because Allah says
      (interpretation of the meaning): “O you who believe!
      Fulfil (your) obligations” [al-Maa’idah 5:1]. And the
      Prophet (blessings and peace of Allah be upon him) said: “The
      Muslims are bound by their conditions.” Narrated by Abu
      Dawood (3594) and classed as saheeh by al-Albaani in
      Saheeh Abi Dawood. 
    

      But there is nothing wrong with
      you practising the profession that you learned, even if you
      learned it through a trick or by impermissible means. It is
      not one of the obligations of repentance that the penitent
      should forget about the profession that he learned or give up
      working in that field; rather he should ask Allah for
      forgiveness for the wrong things he did and work in whatever
      permissible field he wants. 
    

      For more information please see
      the answer to question no. 69820 
    

      And Allah knows
      best.