A UCC-3 Amendment can perfect a security interest in new collateral by modifying an existing UCC-1 Financing Statement. It adds new instruments, property, or assets to the original filing, ensuring the secured party‘s interest is perfected as of the UCC-3 filing date. The amendment eliminates the need for a new UCC-1, provided the original filing is still active. To ensure validity, the UCC-3 must describe the new collateral in detail and be filed promptly with the appropriate authority. This process extends the scope of the original UCC-1, securing the additional assets effectively.