A customs declaration is a document that travelers or businesses must complete when bringing goods across international borders. It provides information about the items being imported or exported, including their value, quantity, and purpose. This helps customs officials assess any applicable duties or taxes and ensures compliance with local laws. When entering a country, individuals may need to declare items such as gifts, food, or electronics. Failing to accurately complete a customs declaration can lead to fines, confiscation of goods, or delays in processing. Properly declaring items helps facilitate smoother travel and trade across borders.