The Tyneside club signed a four-year deal with Wonga.com earlier this week, who are a practising loans company.
Under Sharia Law, Muslims must not receive an advantage from either borrowing or lending money, with the new sponsor’s business going against a number of the players’ beliefs.
Papiss Cisse, Demba Ba, Cheik Tiote and Hatem Ben Arfa are all Muslim in faith, but it is yet to be determined what stance the key players will adopt over the new kit sponsor.
Spanish side Sevilla had a similar problem when Freddy Kanoute refused to wear the club’s 888.com sponsor, due to their betting links.
The Mali international wore an unbranded shirt as a result, but this does not seem possible given the number and importance of Muslim players to the Newcastle cause.