The FDA recently issued a Letter to Industry with recommendations for using Affirmation of Compliance (AofC) codes to expedite release of goods from US Customs and Border Protection (CBP) for imported medical devices. Use of the AofC codes is voluntary but recommended to avoid Customs delays. According to informal discussions with the FDA, proper use of AofC codes can reduce the Customs processing time from several days to a matter of minutes. We have listed some of the most commonly used AofC codes here .