If you hold a passport of certain countries, or have valid Schengen visa, you may not require visa to enter Croatia. More details on Croatian visa regulations can be found here: Rules and Instructions.
If requested IAER may issue you a visa supporting letter provided that your paper has been accepted and you have already paid and registered for the conference. Please be advised that IAER can not sponsor your visa.
If you require visa to enter Croatia, we highly encourage you to submit your paper as soon as possible. Our notification of acceptance is a continuous process. The earlier you submit, the earlier you may receive the feedback and complete your registration and other travel needs.