If you do need visa, the organization will be pleased to give you a letter of invitation for your application. Visa applications are to be done to the nearest Portugeuse embassy or consulate to you. Visa applications requirements and documents needed are to be requested from the concerned embassy or consulate of Portugal. For the list of diplomatic missions of Portugal in the world, please check this link. The letter will be send by Email only.
For further information about the Schengen Visa Information, please check this link.
Please be aware that we won't be able to contact directly consulates or embassies and we do not intervene in anyway with the Visa process as the participant is sole responsible to apply and follow up on his Visa application.
Even with the letter of Invitation and in case we are contacted by the concerned consulates or embassies, we will not be able to support the participant Visa applicant unless he/she is fully registered to the conference and paid the registration fees. For this, we strongly advise our participants to register to the conference before applying for the Visa.