You must meet certain requirements to enter Saint Kitts and Nevis, even if you do not require a visa:
You will not pay any visa fee at the issuance step, you will only pay fee when you arrive at airport, if your visa is confirmed.
Despite it rarely happens, it is possible to get a refusal from the Saint Kitts and Nevis E-visa application.
You must have a passport with validity greater than six months beyond your travel date to Saint Kitts and Nevis.
All nationalities and citizens (visa required) of all countries are eligible for Saint Kitts and Nevis E-visa.