Visa requirements for Ukrainian citizens
For traveling to certain countries, Ukrainians do not need to use a passport, as they may use their Ukrainian identity card or internal passport.
Documents which give the right to leave Ukraine and to enter Ukraine and certify the identity of a citizen of Ukraine while staying abroad are:It's important to know, that the special rules of arriving in a particular country should be studied carefully. Thus, in most countries that do not require visas or issue visas, upon arrival you must have a passport, which is valid for at least 3 months from of arrival to this country.
Ukrainian nationality law
According to Ukraine's nationality law, Ukrainian citizenship can be voluntarily renounced by Ukrainian citizens who have taken up permanent residence in a foreign country and who have acquired a foreign citizenship or have received confirmation that they will acquire a foreign citizenship upon successful renunciation of their Ukrainian citizenship. Citizenship can only be renounced in the presence of a Ukrainian consular official at a Ukrainian diplomatic mission and proof of the final/impending acquisition of foreign citizenship is required to do so.