It is a valid passport or identification card.
Dictionary
It is a document which entitles you to the border crossing.
It is a type of residential document which, along with a valid passport, entitles you to stay within the territory of the Schengen Area member states. Visas are issued as Schengen or national visas by a consul. To obtain a visa, you should contact a proper diplomatic post or consular office in your country of origin.
A national visa issued for a period of 1 year in order to come for humanitarian reasons, due to the interest of the state or international obligations.
From 9th July 2022 there is an easier procedure for obtaining a temporary residence permit for citizens of Belarus residing in Poland on the basis of the so-called humanitarian visas.
It is a scheme, which allows you to cross the border of a given country based on a valid passport, without the necessity of obtaining any visa nor any residence card.
For instance, the Ukrainian citizens who are holders of biometric passports may enter the territory of Poland based on visa-free travel scheme. The conditions of entry and stay, as well as the list of states whose nationals are exempted from a visa requirement when entering the territory of Poland, can be found at the following website:
https://udsc.gov.pl/en/cudzoziemcy/obywatele-panstw-trzecich/chce-przyje....
An agreement based on which you'll perform services as a volunteer. The contract should specify:
- volunteer description
- duration of volunteering,
- conditions for volunteering and supervision,
- volunteer hours,
- funds to cover the cost of your living and accommodation and the minimum amount of pocket money you receive,
- training you need to undergo to volunteer.