Which ancient civilization first used sealed clay tablets as 'brand certificates' to guarantee product authenticity and origin for exported goods?

Before modern logos and slogans, ancient civilizations developed sophisticated methods of brand identity and product differentiation. Merchants in early marketplaces needed ways to distinguish their goods and build customer loyalty. This poll explores how ancient civilizations pioneered retail branding techniques that would influence commerce for millennia to come. Test your knowledge about these early marketing innovations that helped shape the foundations of today's branding practices.

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Ancient Egypt, whose merchants attached clay seals to papyrus certificates for goods shipped across the Mediterranean
Mesopotamia, where Sumerian merchants stamped clay tablets with distinctive cylinder seals to authenticate trade goods
Ancient China, whose Han Dynasty officials created clay seals for silk and spice exports along the early Silk Road
Ancient Greece, whose city-states developed clay token systems to verify the origin of olive oil and wine exports