The U.S. will launch a one-year pilot program on August 20 requiring certain B-1 and B-2 visa holders from countries with high overstay rates to pay a refundable bond of $5,000–$15,000 before entry. Zambia and Malawi will be the first affected, with more nations possibly added. The policy aims to curb overstays, a major source of undocumented immigration. Exceptions apply for humanitarian needs and official travel, and deposits will be refunded if visa terms are met.