The balance of payments (BoP) is a record of all economic transactions between residents of a country and the rest of the world over a specific period. When a country's current account has a deficit, meaning it spends more than it earns through exports, it must cover that gap by borrowing or by selling assets, resulting in a capital account surplus. The relationship can be expressed as: Current account + Capital account ≡ 0. This relationship emphasizes that a deficit in one account must be offset by a surplus in the other. Additionally, countries can utilize their foreign exchange reserves to cover deficits, referred to as official reserve sales. Furthermore, international transactions can be classified as autonomous (driven by other motivations) or accommodating (corresponding directly to the BoP status). Lastly, the section highlights the challenges of accurately recording transactions, leading to the inclusion of errors and omissions in the BoP accounting.