JE is the abbreviation of Journal Entries, which means journal. Post has two meanings, one means mailing, and the other means (accounting) login (ledger, etc.). If you take the first meaning, it is probably the consumption journal of your credit card mailed to you. If it is the third The second meaning is probably the credit card journal that is logged in. It depends on the content of your form. I am not an accountant and know nothing about finance, so I can only understand it literally.