Upfront payment policy?

What is your company policy on upfront payment when ordering spectacles through a medical aid?

Is it your official company policy that the client must first pay 100% upfront in order to receive the glasses, then the franchise/branch will submit the claim to the medical aid, and then when they receive the payment from the medical aid, only then will they repay the client?

Because this is what I am told at one specific branch of yours, but at another branch they say no they do not operate like that. As long as they have all the necessary correct authority papers from the medical aid in writing, with an authority nr, then they immediately supply the glasses to the client and submit the claim and receive their payment afterwards.

Hence my question, are your different franchise owners allowed to individually operate outside of the stipulated contract with a specific medical aid at own will, or are they bound to Spec Savers Holding Company to a set rules of operations?