This paper explores the application of blockchain technology in Cash-on-Delivery (COD) systems, incorporating smart contracts, encrypted Non-Fungible Tokens (NFTs), and the InterPlanetary File System (IPFS) to enhance transaction security, data accessibility, and integrity. We review the functionality and efficiency of various encryption algorithms, including RSA, RC4, DES, ChaCha20, Blowfish, and AES, assessing their effectivenenm ss in safeguarding transaction data and enhancing system operations. By integrating these technologies into a COD framework, our study aims to address privacy concerns, improve transparency, and streamline transaction processes in e-commerce. We discuss our multi-platform blockchain deployment strategy, analyzing the strengths and weaknesses of different EVM-supported environments to determine their suitability for COD transactions. Our findings suggest that a well-implemented blockchain system could significantly improve the security and efficiency of COD transactions, providing a robust alternative to traditional delivery methods.