The American Institute in Taiwan (AIT) had, through diplomatic channels, notified the MOFA and confirmed that holders of such altered passports may be extensively questioned by the U.S. Customs and Border Protection (CBP) officers and be removed from the United States, and on March 2016, two travelers from Taiwan voluntarily removed Republic of Taiwan stickers because of the extensive questioning by CBP officers. The two travelers were eventually admitted into the U.S., while a CBP spokesperson warned that alterations of travel documents made by any person who is not authorized by the government of a country can render it invalid and will result the holder's refusal of admission to the U.S., and placing Republic of Taiwan stickers on passports is deemed to have altered the travel documents. Similar incident also occurred in Japan when a holder of altered passport was taken to secondary inspection. After being told that he would be deported, the man finally removed the Republic of Taiwan stickers and placed them on his T-shirt and was allowed into Japan.