Certifying biodegradable products ensures they adhere to specific environmental standards, particularly concerning their decomposability under certain conditions. Two key ASTM International standards, ASTM D5511 and ASTM D5526, provide methodologies for assessing the anaerobic biodegradability of plastic materials, simulating conditions found in landfills. This understanding of ASTM D5511 and D5526 is crucial for evaluating biodegradable products' environmental impact.