Migration regulations are a subject to change, therefore it is always useful to check at the Lithuanian embassy or consulate about what type of visa / temporary residence permit (TRP) is needed. Updated information about the required documents and procedures is also available on Internet site of the Ministry of Foreign Affairs or Lithuanian Migration Department. Depending on the citizenship and length of stay in Lithuania, one may be able to enter Lithuania without a visa.
KVK issue mediation letters for all study applicants if they need to apply for visa/TRP. But it is applicant responsibility to verify all the consular requirements before traveling to Lithuania and making appointments for visa / TRP visa with Embassy/visa center.