The differences between electronic invoices of ofd and pdf are as follows:

1. Usage: ofd is the electronic certificate for reimbursement records and filing; Pdf is a preview of taxpayers.

2. Check function: ofd can check the validity of invoice producer seal and electronic signature in the "VAT electronic invoice plate file reader"; Pdf does not support checking the validity of invoice seal and electronic signature.

Special reminder: If the electronic invoice reimbursement is filed on a daily basis, the "OFD format file" of the electronic invoice still needs to be saved.