The continuous expansion of the global halal meat market has attracted interest from governments, food business operators and the animal and meat science research fraternity. Despite this growing trend, and the enormous economic benefits associated with it, there is a lack of clarity regarding what is ‘authentic’ halal. Many Islamic jurists are reluctant to approve animal slaughter methods that were not practiced at the time of the Prophet of Islam, Mohammed. Others insist that since Islam holds animal welfare in high regard, any modern method of slaughter that is shown to improve animal welfare without compromising on the basic requirements of halal slaughter can be approved for halal production. This paper highlights the aspects of modern slaughter that continues to divide scholarly opinion among Islamic jurists. It also examines the arguments put forward by opponents and proponents regarding the acceptability of modern slaughter techniques for halal slaughter.