Valid & Invalid transactions

Q: I wanted to find out a fatwa regarding weights and measures in my business. 

We are steel traders. We buy steel a certain thickness say 0.2mm but the factories that produce it can’t get the exact thickness due to the production process. So the thickness varies from 0.195 to 0.205mm, sometimes more sometimes less. 

What is the ruling on this because we sell the product as 0.2mm. We sell as per the thickness that we order. We don’t order a lower thickness and sell as a higher thickness. This is purely a production tolerance level as the machines can never get it exact.

Q: Is it permissible to bypass an estate agent in purchasing a property? 

Example, I see a property for sale on their website/see their board outside the property. I then go directly to the seller and do a private deal with them, to avoid getting the estate agent involved and to avoid paying them commission. Is this permissible?

Q: In some businesses it is common practice to special order an item for a customer, when it is not in stock, by taking a non-refundable deposit, e.g., 25% or 50%. At times the following situations arise after the item is purchased from the supplier and it arrives: 

1. The customer pays the balance and the sale is concluded. 

2. The customer changes their mind and then wants a refund, which is refused because the item was specially ordered. 

Is it permissible to conduct business in this manner?

Q: I have seen previous questions, about whether purchasing extended warranties which are a separate line item at the time of purchasing a product, are haraam. 

Please advise if it is permissible to sell the same item, at different price points but the higher price point has a longer warranty? The warranty is not a separate line item.

Q: Some stores mark products at a certain price but round off the amount. For example, the item is marked at R12.99 or R12.95, but they then round off the amount and sell the product at R13. There's no question of change. Is this permissible?

Q: I purchased a 50 hectare farm which is not fenced off. I did not know that there are some animals on the farm. Am I the owner of those animals?

Q: It is right to sell an item higher than it's retail price which is mentioned on the product box?

Q: 

1. If a customer was to order something that the business didn't own (it wasn't in stock) and rather than paying full price on it, they agreed to put a deposit down and pay full price after the product was delivered to their house and it was fitted into their house (fitting is a separate service and a customer can order a product and request fitting it into their house or they can order a product with the fitting service together). 

Would the income be halal for this? The product will be delivered to the shop first and then the business will send the product to the customers house and fit it. 

2. If you tell a customer that the product isn't in stock and they have to order it in and if they do, they don’t have to pay full price, rather just a deposit and then when the product is delivered to their house or ready to collect from the businesses store, they can pay full price after that, is the income halal?

Q: I bought airtime and put it in my phone. I used the airtime to buy a bundle of data. I never notice my airtime was fifty cents less. They charged me an emergency recharge. They gave me R2 and said from my next airtime they will take R2+R1.10 access fee. What must I do at that time? When agreeing, I never know it was interest but after that I sensed it. Please advise.