The ONCE (National Organization of the Spanish Blind) runs a daily lottery draw from Monday to Thursday, where participants can win up to 500,000 euros by matching a complete number and its series. This initiative has become a highly anticipated weekly event, drawing significant public participation and engagement. The prize structure has evolved over the years to include various levels, increasing the accessibility and excitement surrounding the lottery.

Founded in 1938, the ONCE was established with the mission of improving the quality of life for individuals with visual disabilities. The organization has adapted its lottery products to meet the needs of its participants over the decades. Originally, the lottery tickets were provincial and featured only three digits, but they have since transformed into a national lottery format that currently consists of five digits and a greater variety of prizes, reflecting ONCE's commitment to modernization and community service.

The Daily Coupon format as we know it today was formalized in 1984, and it has become an integral part of the ONCE's fundraising efforts, enabling the organization to continue supporting various programs and initiatives aimed at assisting people with disabilities. Each draw not only provides the chance for financial gain but also plays a crucial role in sustaining the ongoing mission of the ONCE to enhance the lives of the visually impaired.