If it comes under the voluntary free work then I think you don't as you are not earning any money out of it. I think Visas are mostly require to restrict the amount of money you can. In UK the student visas for example allow you to work for 15 hours a week.
Hope this Helps
No such thing as free visa buddy
i need the visa for work in any country
To get a work visa you will need a work permit. When you get the work visa it will act as your entry visa to the country. So you will not need a separate visit visa.
Dar sir I need free visa to Slovenia
Yes, ALL foreigners need a valid work visa to work in the US.
Yes, you typically need a work permit or visa to work in Canada as a foreign national.
visa free countries with nigeria passport
Yes you need a visa and alot of paper work
No, first 90 days are visa free.
As a citizen of Ghana you need a visa for Romania.
if you are resident in ireland do you need visa to bolivia
No, you generally need a visa to work in the UK as a foreign national.