On Saturday, April 1, an internal memo went viral indicating that Nairobi County would start charging motorists with model stickers up to Ksh5,000 as advertising fees.
The memo indicated that vehicles such as BMW, Toyota, and Ford among others, would be charged Ksh1,250 per annum.
The memo indicated that the new changes would be effected on Saturday, April 15.
"All vehicles with all forms of advertising on them will now have to pay the statutory fees as prescribed by the Council," the memo read in part.
"Whereas branded vehicles have been paying, this bracket has now been expanded to include any vehicle that has any form of wording or signage that promotes a product," it added.
However, Sakaja responded with a smile, indicating that it was part of an April Fool's Day prank.
Sakaja was compelled to respond after the memo went viral, attracting over 32,000 views on Twitter.
"This is crazy, please, Johnson Sakaja, shed some light on this," one concerned motorist reached out to the city governor.
However, the Governor stated it was a joke marking April Fool's Day.
A clue that gave away the prank was that Hezborne Ogombeson, a former military officer who signed the letter, is not part of Sakaja's administration.
According to city by-laws, motorists are charged for parking in the city. The county also targets matatu operators with different rates in various parts of the city.
To enhance service delivery, Sakaja digitised operations, including parking fees for motorists in the city.