There is insufficient information available to create a comprehensive Wikipedia-style article about the US nonprofit organisation named "Guaranteed Income Validation Effort" with EIN 861211415. However, if you are interested in learning more about guaranteed income initiatives in the United States, here is some general information:

Guaranteed Income Initiatives in the U.S.

Guaranteed income initiatives have gained significant attention in recent years as a potential solution to poverty and financial insecurity. These programs involve providing regular, unconditional cash payments to individuals, often without requirements for how the funds are used.

Key Players and Initiatives

• Stockton Economic Empowerment Demonstration (SEED): One of the pioneering guaranteed income pilots in the U.S., launched in Stockton, California. It provided $500 per month to 125 residents for two years without conditions[1].
• Mayors for a Guaranteed Income (MGI): A coalition of over 125 mayors advocating for a federal guaranteed income policy. It was founded by former Stockton Mayor Michael Tubbs and works closely with various cities to launch local guaranteed income pilots[3][4].
• Jain Family Institute (JFI): This organization has been instrumental in researching and promoting guaranteed income policies, focusing on improving existing safety nets and facilitating upward mobility[2].

Impact of Guaranteed Income Programs

Research has shown that guaranteed income can enhance financial stability, improve mental health, and provide recipients with a sense of autonomy and dignity. Participants often use the funds for essential needs, savings, and personal development[3]. However, there is ongoing debate about the sustainability and scalability of these programs at a national level.

Philanthropic and Public Funding

Many guaranteed income pilots are funded by philanthropic organizations, but there is an increasing trend towards incorporating public funding, particularly through programs like the American Rescue Plan Act[1][4].

If "Guaranteed Income Validation Effort" is involved in similar initiatives, it would likely focus on evaluating or supporting guaranteed income programs within its specific scope. However, without additional details, a detailed article cannot be created.