Which ancient civilization first used merchant seals (early brand logos) to guarantee product authenticity and build customer loyalty in long-distance trade?

Before modern retail, ancient civilizations had sophisticated marketplace systems with their own version of brand loyalty and customer retention. From Roman merchant guilds to Egyptian royal seals that guaranteed quality, branding has ancient roots. This poll explores how ancient civilizations created trust and loyalty in their commercial systems, revealing that brand recognition and customer loyalty strategies have been evolving for thousands of years.

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Mesopotamian (Sumerian) merchants around 3000 BCE
Ancient Egyptian traders during the New Kingdom (1550-1070 BCE)
Phoenician sea traders around 1200 BCE
Indus Valley merchants around 2600 BCE