The Sumerians were the first to use concepts of contracts, invoices, receipts, and rudimentary credits. They started the concept of finance after the Babylonians around 2000 BC (Hammurabi’s code), with the concept of interest that was paid with seeds or other goods. The emergence of coins was around the 7th century BC. C. in Lydia, present-day Türkiye. Over time, the accumulation of these coins began to be a problem, as they could lose control of how much they had saved. The concept of a bank began to emerge with this problem.