Ask the competent Chamber of Crafts and Trades to advise you. Afterwards, you can lodge an application to have the equivalency of your qualifications recognised.
The competent authority will check whether there are any significant differences between your job qualification and the German equivalent.
Note: If you cannot procure some or all of your foreign documents, the competent authority may offer you a skills analysis to determine your professional competence (e.g. subject-related interview, test of work).
If the competent authority does not find any significant differences, you will receive a certificate of equivalency. You will not receive a German examination certificate.
If the competent authority finds significant differences, it will analyse your existing job qualification and explain the major discrepancies between your qualification and the German one. If your qualification is deemed partly equivalent, ask the competent authority about adjustment qualifications.
Note: You would like to become self-employed in a craft or trade that requires a licence, but the equivalency of your foreign qualification is not fully recognised? Ask your competent Chamber of Crafts and Trades about alternatives.