You must have your high school certificate/diploma legalised (authorised) and recognised in Poland.
Legalization / Apostille is the official confirmation that a signature, seal or stamp on a public document is genuine.
Apostille
If a country in which a given document was issued is a party to the Convention Abolishing the Requirement of Legalisation for Foreign Public Documents, concluded in The Hague, 5 October 1961, the document’s legalisation is replaced by an Apostille certificate attached to it. The list of countries – parties to the Convention and the institutions authorised to issue the Apostille is available here.
Legalization needs to be made in the case of documents issued in states that are not parties to the Hague Convention of 5 October 1961.
The legalization is done by the consul of the Republic of Poland having jurisdiction with respect to the state in the territory of which, or in the education system of which the given certificate was issued.
Recognition of foreign educational documents
Admission to first-cycle and long-cycle Master’s degree programmes
Foreign secondary school certificates may be recognised in Poland automatically or may require a recognition statement issued by the Polish National Agency for Academic Exchange (NAWA).
Automatic recognition means that documents recognised in Poland by law may be submitted directly during the admission process without any additional recognition procedure.
For candidates whose certificates are not recognised automatically, it is required to obtain a recognition statement issued by NAWA, confirming that the document entitles the candidate to undertake first-cycle or long-cycle Master’s degree studies in Poland: https://nawa.gov.pl/uznawalnosc/wydawanie-informacji-o-zagranicznych-dyplomach/swiadectwo-szkoly-sredniej.
Admission to second-cycle degree programmes
For higher education diplomas that are not recognised by law in Poland, candidates are required to obtain a recognition statement issued by NAWA, confirming the right to undertake second-cycle studies in Poland.
Detailed information on the recognition procedure is available on the NAWA website:
https://nawa.gov.pl/uznawalnosc/wydawanie-informacji-o-zagranicznych-dyplomach/dyplom-ukonczenia-studiow.
Important! The processing time for a recognition statement issued by NAWA may take up to approximately 60 days. Therefore, candidates are strongly advised to submit their application to NAWA well in advance in order to obtain the required document in line with the admission schedule.