If your passport does not contain a first name (given name), the industry standard in 2026 is to use the placeholder "FNU" (First Name Unknown). When booking, you should enter your single name in the Surname field and then enter FNU in the Given Name field, often followed by your title (e.g., JONES/FNUMRS). Alternatively, some airlines suggest using your title (MR/MRS) in place of the missing first name to satisfy the system's character requirements. It is important to note that certain regions, such as the United Arab Emirates, have much stricter rules and generally require at least two names (a surname and a given name) to be present on the travel document for entry. If your passport only has one name, you should contact the airline directly to ensure your reservation is accepted by both the carrier and the destination country's immigration authorities.