Blindfolds can be spawned through the M / F1 Menu and used on another nearby player.
Open:
M / F1 Menu > Player & Ped Options > Item Options > RP Items
Find:
Blindfold
Select it to add the blindfold to your inventory.
Move directly next to the player you want to blindfold.
You can then use the blindfold in either of two ways.
If the blindfold is assigned to one of your numbered inventory slots, press the corresponding number.
For example, if the blindfold is in slot 1, press:
1
The blindfold will be applied to the closest eligible player.
Alternatively:
You need to be standing close to the person you want to use it on.
The blindfold will then be applied to the closest player.
Stand next to the person who currently has the blindfold on.
Hold:
Left Alt
Target/interact with the player and select:
Remove Blindfold
The blindfold will then be removed from them.
1. Open M / F1 Menu
2. Go to Player & Ped Options > Item Options > RP Items
3. Spawn a Blindfold
4. Stand next to the person
5. Use the blindfold from your numbered hotbar slot or right-click it in your inventory and select Use
6. To remove it, stand next to them and use Left Alt > Remove Blindfold