Father selling some of his property to one of his sons

The sale was done without witnesses and the seller denies it. Is it permissible to add the names of two witnesses to the contract?

Ruling on selling shares by instalments whilst leaving them in the name of the original owner

“No returns or exchanges on goods sold”

Increasing the price of meat so as to raise some money for the mosque

Ruling on discounts if instalments are paid before they are due

There is nothing wrong with selling live animals by weight

Ruling on buyer selling the land before the title deed has been issued

It is not permissible to rent a house to him on condition that he gives a loan

Ruling on buying a product for deferred payment through the bank