Personal coupon code

I would like to give an acquaintance a personal coupon code. This person helps me to write texts in another language than my own: his native language.
So I thought that it would be appropriate to give him a coupon code, because after all, I will benefit from his effort. Is this possible?

Hey @User_EU-05d9a4ce,

I think its great that you want to give something back to your acquaintance. You could easily buy a gift voucher here:

and send it to him. That surely would be the easiest way to say THANK YOU.