The participants coming from outside the European Union and requiring visa information should visit the Cyprus Ministry of Foreign Affairs website. This site will enable you to find out whether you need a visa or not. If you do need a visa it will provide you with links to the forms you need to fill out and contact details from where you can obtain a visa.
If you need a letter confirming your participation to the workshop, then you can request it from the Registration Tool. However it will only be issued after a registration and payment has been received, and there can be no exceptions to this.