Hi,
I'm not sure if there is one clear guideline for this situation. I can only tell you what IÂ’ve experienced.
Before departure I have been reading a lot about the do's and donÂ’ts. I found out that it should be clarified when entering the country that you intent to get married to your Mauritian partner - to make sure you don't obtain a regular tourist visa. So I wrote down on my paper my purpose of this visit is "marriage". Furthermore because I moved to Mauritius, I quit my job and on therefore I was officially unemployed. This I wrote down at the paper under "profession".
The result of these two things was first of all a talk about money with the man at customs. The smartest thing to do is to bring prove of the money you have. I brought a letter from the bank, but it is more effective to show them the numbers; bring a bank statement of a Euro-account or a Mauritian bank account.
Secondly I was being asked if I was going to attend a marriage or if I was getting married. I clarified it was me who is getting married. The result: a one (!) month visa, clearly stating it is for marriage. The stamp looks the same as a tourist visa, but mine had a different note on it and stated it was for one month, and not the regular 3 months that I expected. I did not try to negotiate about this, for me one month was fine, so I donÂ’t know if this 1 month visa is a fixed duration in such cases or if it was randomly given.
Also I had to come into a small office to fill out a paper, that I have entered the country under a one month visa to get married to my partner and disclosing I don't have HIV/AIDS. The man told me this paper will be send to the Civil Marriage Office in Port Louis - and for this reason I didn't get a copy of it at the airport.
Before I left my country I also booked a return ticket (for 2,5 months later), to avoid getting any troubles when entering the country. I was not being asked to show this, but to be on the save side I would still advice to you book a ticket to Reunion before your departure.
All I can tell you more is to be prepared. Bring all the papers from your home country which you need for your marriage, for entry to the country and for opening a local bank account. DonÂ’t lie about your reasons for visiting and give all contact details of yourself and your partner.
After arrival I advise you to soon go to the office for Civil Marriages in Port Louis. Make sure you go when you have time, to wait and to go from place to place to get things arranged. The people working there are very friendly and will help you clarify everything you need for your marriage. Also they will be able to give you the contact details for example of a lawyer for your affidavit.
Good luck!