Yes, since the Slovak e-vignette is not linked to the person but to the vehicle's number plates, you can buy the vignette for another person (e.g. as a gift).
Important: No refunds are issued for entering the wrong details when placing the order. Please make sure to enter the correct registered country and license plate details of the vehicle. A common mistake is using an “O” instead of a “0”.
You can order your Slovak e-vignette comfortably here.
Related articles:
Is the Slovak e-vignette linked to the car or the person?
Does the Slovak e-vignette activate immediately?
Can I buy a Slovak e-vignette on weekends and public holidays?