You cannot directly send Robux to another player
Buy a Roblox Gift Card and give the code to the person
Join the same Roblox group and use group payouts if you own the group and have Robux in the group funds
Create a game pass, shirt, or other item and have the other person buy it
Use the Roblox Marketplace to sell an item to the other person
Make sure any transfer method follows Roblox rules and terms
Avoid third-party Robux sellers or unofficial transfer methods