<h1>Understanding Guarantees, Warranties, and Quality Marks: ISI, AGMARK, and More in Product Certification.</h1> Guarantee refers to a promise to fulfill another's obligation if they default, while a warranty assures product quality over time. Green and Brown Marks indicate vegetarian and non-vegetarian food packaging, respectively. The Bureau of Indian Standards (BIS) certifies products with the ISI mark, ensuring quality. Hallmarking verifies gold purity. The Fruit Products Order (FPO) regulates hygiene in fruit product manufacturing. AGMARK certifies agricultural products for quality, including mandatory certification for certain oils. ISO standards provide a framework for global standardization across industries, facilitating trade and technology exchange.