NOSH GIFT CODES are issued directly by NOSH. Here are some ways you can get it:
When you attain a new user level
When nosh is feeling like father Christmas and doing giveaways (Mostly on NOSH INSTAGRAM PAGE)
When NOSH feels like rewarding you directly as a customer
Acts of random kindness
Summarily, NOSH GIFT CODES can only be given to you out of NOSH's free will. You cannot request it.
The easiest way to earn it is by attaining user levels.