This a simple set of numbers that players enter into a section of casino website to show that they have fulfilled some conditions to qualify for a reward. The code may be earned in the casino or an affiliate. Each code earns a different reward but all benefit the player by allowing them to play for free.
Iran is known for being the successor to the Persian empire, keeping its history and traditions. Gambling in Iran is illegal and the laws are influenced by the Islamic religion. This includes online gambling. Iran has placed strict restrictions on internet usage censoring a lot of content, including foreign gambling websites.