South Dakota's State Treasurer holds approximately $200 million in unclaimed property. Sioux Falls's role as one of the largest U.S. credit card industry centers — Citi, Wells Fargo Cards, Capital One — generates a uniquely high volume of credit-card-related unclaimed property: refunds, rebates, and account-balance payments.
Reviewed by David Dorfman, CEO & President of Claimio. Last updated 2026-02-13.