As far as gold is
concerned, does the gold have to be paid for and received in one sitting?

Gold price fluctuates
by the minute. 

We have to book coins
and pay for it in advance by one day, sometimes two. Is this legit?

That is we pay now and
get delivery tomorrow, based on the current price. If the supplier has it in
stock, they supply us from their own stock. If they don't have, they order from
the refinery. We pay them the price at the moment of our transaction. They pay
the refinery based on the price at the time of their transaction with the refinery.

Answer: 

In principle, if one is selling gold for gold or silver for silver, it is necessary that Qabdha (possession) takes place during the transaction from both parties and therefore, to sell it as credit will be impermissible.(Fataawa Hindiyyah Vol. 3 Pg. 217). However, when one is buying gold in exchange for other currencies, such as dollars or Rands, it will be permissible to pay for the gold in advance and then receive the gold at a later stage with the following conditions:

i. Possession from one side must take place during the transaction. In our scenario, one must pay at the current moment in dollars or Rands in lieu of the gold that he will receive later on.

ii. The time of receival of the gold must be stipulated. (Shaami Vol. 5 Pg. 180 - Fataawa Uthmani Vol. 3 Pg. 159) 

Therefore, based on the above-mentioned, the method in which you are buying the gold is permissible.

AND ALLAH TA'AALA ALONE IN HIS INFINITE KNOWLEDGE KNOWS BEST

ANSWERED BY: Zaid Mahammad

CHECKED AND APPROVED BY:  Mufti Muhammed Saeed Motara Saheb D.B. 

Islamic Date:27 Safar 1440  English Date: 11 November 2018