Turkey (officially the Republic of Türkiye) may reject a visa application for several specific administrative or security reasons. The most common cause in 2026 is an invalid or expiring passport; your passport must be valid for at least 60 days beyond the "duration of stay" of your visa. Another frequent reason is incomplete or inconsistent documentation, such as a mismatch between your flight dates and your hotel reservation, or failing to provide proof of "sufficient financial means" (typically $50 per day of stay). Security concerns also play a major role; if an applicant has a criminal record or is found on an international watch list, the visa will be denied. Furthermore, if you have previously overstayed a visa in Turkey or violated local laws, you may be blacklisted from re-entry. For those applying for an e-Visa, rejections often occur due to simple "typos" in the digital form—such as entering a "0" instead of an "O"—which the system flags as a fraudulent identity attempt. Always ensure that the information on your e-Visa matches your passport exactly to avoid a "gate-side" rejection.