Anyone preparing to travel to Kenya already knows or is informed that to enter the country must be in possession of a residence permit for a maximum of 3 months (renewable if necessary for another 3 and no later, at the immigration offices).  
At the moment it is still possible to go to the counter of the immigration authorities of the airports of arrival with the relative complicated paper model and pay 40 euros or 50 dollars to have the sticker applied (or to have your passport stamped, in the absence of stickers, sometimes it can happen, in which case you must always check the duration of the visa if you want to use it in full, because sometimes it is marked only one month). However, more and more travellers are using the online visa procedure, which has been in force for four years now. The ONLY AUTHORIZED SITE to issue Kenya E-visa is that of the government, or evisa.go.ke. You can enter directly or also access from the e-citizen site of the Kenyan immigration office.
In these four years, the inevitable criminals of the network have developed fake sites that promise to issue visas online for Kenya. They are sites that usually change their addresses every now and then so as not to be tracked and discovered and that refer to American, English, South African or the notorious Caribbean islands called "tax havens", such as the Cayman.
Lately we have reported to our readers these three addresses: evisa-kenya.com, kenyavisagov.com and kenyaevisagov.com. We ask those who read us to help us in the search and send us other potential addresses of sites-scam by writing to www.malindikenya.net or through our Facebook page info@malindikenya.net
There are two types of scams: the classic one where you enter data, photograph and fill in the visa as in the official website, pay your 40 euros and then you will never receive the Kenya Visa, and the one that is not a real scam, but a sort of agency that makes you pay a "commission" to "help" you to make the residence permit for Kenya.
Basically, asking for 99 euros, it takes all the data (including your passport) and then sends them back to the official website evisa.go.ke, pays the regular 40 euros and gets the evisa that will then turn you. The success of these sites, in addition to the lightness and ignorance of English by many Italians, is due to the fact that sometimes the official website of the Kenyan government is offline (at the beginning of October 2019 it was offline for 4 days, with the impossibility of carrying out any operation not only by those who wanted, perhaps at the last minute, to do the evisa online, but also for renewals of licenses, work permits and other services that, unlike the evisa, no longer have the double possibility of using the old paper method).
In conclusion, be wary of these sites that have already claimed several victims and if you want to make the visa online that often allows you a quick exit from the airport and, especially in Mombasa, automatically protects you from any attempt to extort (increasingly rare, in fact) entrusted only to the official website of immigration.