A South Sudanese E-visa can now be obtained online through the government website at the following link;
You can also apply for one at the South Sudanese Embassy near you. It is hard to get a visa on arrival and you may risk deportation.
It is necessary to provide the following documents when applying for a visa:
We also provide supporting documents that will be required when applying for your visa including company registration details.
Other information when Applying for EVisa.