To apply for a visa to visit Mauritius as a Bangladeshi citizen, you would typically need to follow these steps and provide the required documents:

1. Visa Application Form: Complete and sign the visa application form, which can usually be obtained from the Embassy or Consulate of Mauritius. Please ensure that all the information you provide is accurate and up-to-date.
2. Passport: Submit your original passport, which should be valid for at least six months beyond your intended stay in Mauritius. It is essential to have a passport with a minimum of two blank pages for visa stamps when applying for a visa to visit Mauritius as a Bangladeshi citizen.
3. Photographs: Provide two recent passport-sized photographs with a white background. The photos should comply with international standards (size 35mm x 45mm) and show a clear image of your face.
4. Flight Itinerary: Submit a copy of your confirmed round-trip flight itinerary. This should include details of your entry and exit dates from Mauritius.
5. Accommodation Details: Provide proof of accommodation for your stay in Mauritius. This could be in the form of hotel reservations, an invitation letter from a host in Mauritius, or any other document that confirms your accommodation arrangements.
6. Financial Proof: Show evidence of sufficient financial means to support your stay in Mauritius. This can be in the form of bank statements (covering the last three to six months), traveler’s cheques, or a sponsorship letter if someone else is covering your expenses.
7. Travel Insurance: Obtain travel insurance that covers medical expenses, emergency medical evacuation, and repatriation. Ensure that the insurance is valid for the duration of your stay in Mauritius.
8. Employment Proof: If you are employed, provide a letter from your employer stating your job position, length of employment, and permission for your leave of absence during the intended travel period.
9. Invitation Letter (if applicable): If you have been invited by someone in Mauritius, provide an invitation letter from your host. The letter should include their contact information, your relationship to them, the purpose of your visit, and the duration of your stay.
10. Cover Letter: Write a personal cover letter addressed to the Embassy or Consulate of Mauritius. This letter should explain the purpose of your visit, your travel itinerary, and any additional relevant information.
11. Proof of Travel History: Submit documents showing your previous travel history, such as previous visa stamps, entry/exit stamps, or copies of previous passports.
12. Visa Fee: Pay the applicable visa fee as per the instructions provided by the Embassy or Consulate of Mauritius. The fee amount may vary depending on the type and duration of the visa.