Seychelles is a visa-free country, meaning that most travelers do not require a visa to enter. However, all visitors must obtain a Visitor’s Permit upon arrival, which is issued free of charge and initially valid for up to three months. This permit can be extended for a fee for an additional period, not exceeding a total of twelve months. 

Wikipedia

Requirements for Entry:

• Valid Passport: Must be valid for the duration of your stay.
• Return or Onward Ticket: Proof of departure from Seychelles.
• Proof of Accommodation: Hotel reservations or an invitation letter from a host.
• Sufficient Funds: Evidence of financial means to cover your stay.
• Yellow Fever Vaccination Certificate: Required if traveling from a country with a risk of yellow fever transmission.

Electronic Border System (SEBS):

Before traveling, all visitors must complete the Seychelles Electronic Border System (SEBS) online. This system streamlines entry procedures and requires travelers to submit necessary information and documents prior to arrival. 

Wikipedia

Application Process:

1. Access the SEBS Portal: Visit the official Seychelles Electronic Border System website.
2. Complete the Application: Fill out the required personal and travel information.
3. Upload Documents: Provide necessary documents, including passport details, accommodation proof, and vaccination certificates.
4. Payment: Pay the processing fee (10 EUR) via credit or debit card.
5. Confirmation: Receive an electronic travel authorization, valid for one journey.

Important Notes:

• Processing Time: Applications can be submitted up to 30 days before travel.
• Validity: The authorization expires once you exit Seychelles.
• Kosovo Nationals: Entry is refused to Kosovo passport holders, as Seychelles does not recognize the State of Kosovo. Wikipedia

For detailed information and assistance, you can visit the Seychelles Immigration Department’s official website.