Most people find it difficult enough to keep track of two or three credit cards. But Manish Dhameja managed something far more unusual—he built a collection of 1,638 valid credit cards and turned it into a Guinness World Record. His collection was officially verified in Hyderabad, Telangana, on April 30, 2021. At first, the number sounds almost impossible to manage. However, Manish has explained that the cards are not simply stored away as souvenirs. Each one can serve a different purpose. Some cards offer cashback, while others provide air miles, hotel benefits, movie discounts, fuel rewards or access to airport and railway lounges. The real challenge is not just owning them—it is remembering the billing dates, payment deadlines, spending limits and reward conditions connected to every card. His habit became especially useful during India’s demonetisation in November 2016, when ₹500 and ₹1,000 banknotes were suddenly withdrawn. While many people were standing in long queues to g...