local PlayerService		=	game:GetService("Players")
local BadgeService		=	game:GetService("BadgeService")

PlayerService.PlayerAdded:Connect(function(Player)

	local BadgeCheckSuccess, BadgeCheckError	=	pcall(function() --pcall takes care of any errors without 'breaking' your scripts

		local PlayerHasBadge	=	BadgeService:UserHasBadgeAsync(Player.UserId, ReplaceThisWithYourBadgeId)

		if not PlayerHasBadge then

			BadgeService:AwardBadge(Player.UserId, ReplaceThisWithYourBadgeId)

		end

	end)

	if BadgeCheckError then print(BadgeCheckError) end --This will print any errors to the output.

end)