When customers attempt to purchase alcoholic beverages who decides whether the sale is legal or not?

When customers attempt to purchase alcoholic beverages who decides whether the sale is legal or not? The seller/server. Though the customer needs to be honest about their age and ability to purchase the alcoholic beverages, it is the sellers responsibility to check that the person is actually eligible. The seller will check the buyers ID (identification card) and make sure they are hold enough to purchase alcohol. They have the right to deny the sale if the person is not legally allowed to purchase. 

Via:   "if you are found to be supplying or dealing drugs, the punishment is likely to be tough. supplying drugs doesn’t just apply to dealers. if police suspect that you intend to share drugs with your friends, this is still considered to be supplying.

being suspected of supplying drugs means you are much more likely to be charged. the amount of drugs found on you, and whether you have a criminal record, will be taken into account when a punishment is being decided.

decisions to prosecute are taken by the public prosecution service. the maximum sentences for intent to supply drugs are:

- up to life in prison or an unlimited fine (or both) for a class a drug- up to 14 years in prison or an unlimited fine (or both) for a class b or class c drug."sorry if this was a school question, you didnt supply options so i assumed it was a personal question, which if it is, reconsider selling or having possesion of any drugs at all. i wish you the best!