My Verifone VX520 is already working fine online, but I still have to keep business running when the network goes down. I need the terminal to keep a complete, reliable record of every purchase while it is offline, then upload the data once connectivity returns. In short, I want transaction logging fully activated and tested in offline mode. If you have hands-on experience with VX520 parameter setup, EMV kernel options and the usual Verifone configuration tools (VX Manager, PC Load, or comparable utilities), you will feel right at home here. I can provide remote access to the terminal or share current parameter dumps—whatever you need to move quickly. Acceptance criteria • VX520 successfully stores each sale locally with all mandatory fields (amount, PAN mask, date/time, auth code placeholder). • No disruption to existing online payment flow or receipt printing. • Clear step-by-step notes so I can repeat the setup on additional units. • Feature demonstrated in a short live or recorded test before sign-off. Timeline is tight—I’d like this wrapped up ASAP—so please let me know how soon you can jump in and how you plan to tackle the task.