Using the electronic invoice duplicate checking tool, we can identify electronic invoices in OFD and PDF formats, and support the verification of authenticity while registering invoice reimbursement duplicate checking, which greatly saves working time and improves work efficiency. Not only that, but also supports employee pre-filling invoice information and original scanning and auditing, input deduction invoice collection, invoice ledger management, joint duplicate checking and enterprise employee reimbursement management. At the same time, it supports multi-invoice header, multi-company management, multi-person joint duplicate checking and invoice ledger export.