While the nonprofit industry as a whole confronts concerns about accountability, getting and keeping new donors remains the biggest challenge facing individual nonprofits, a new study says. Blackbaud, a Charleston, S.C.-based software company serving nonprofits, conducted an online survey of 1,000 U.S. nonprofit professionals to determine the challenges they face. Almost half of those surveyed say accountability to their constituents and regulators is one of their three biggest concerns, the survey says, but almost two in three nonprofits say recruiting and keeping donors is their greatest challenge. More than one in three say an increasing number of their donors are asking for information on how their donations were spent, but almost all nonprofit professionals say they believe their donors trust them to use donations appropriately. Two in three groups say they proactively provide donors with information on how their contributions are used, more than nine in 10 have audited financial statements, and seven in 10 have created audit committees, the survey says.