WP-Invoice stores every invoice as a row in the WordPress posts table under its own post type, with a status that moves through draft, active (sent), paid, refund, and archived. Amount, recipient, due date, and line items live in postmeta under WP-Invoice's own keys, and payments are recorded against the invoice ID once a gateway settles. The result is a flat list in the admin grouped only by paginated date.

SleekView reads the posts table filtered to the WP-Invoice post type and joins on postmeta to expose amount, due date, and recipient as fields on every row. The natural column to group by is the WP-Invoice post_status, which moves an invoice through Draft, Sent, Paid, Refund, and Archived. Cards show the invoice number from post meta, the recipient, the total, and the due date so accounts receivable reads the queue without opening anything.

Dragging a card from Sent to Paid writes the new post_status value through wp_update_post, which is the same call the WP-Invoice admin makes when an invoice is marked paid manually. WP-Invoice hooks listening on the status transition fire normally, so any thank-you email, accounting export, or follow-up automation behaves the same as it would on a manual mark. Refunded and archived invoices stay visible as their own columns instead of disappearing behind a filter, which matters when month-end reconciliation pulls every state into a single view.

WP-Invoice does a clean job of issuing and tracking invoices, but it leans on the WordPress posts list pattern, which means a paginated table sorted by date with a status filter. AR teams think in columns, not filters: drafts they are still writing, invoices sent that they are chasing, payments cleared, and refunds that need reconciling against the bank. A kanban grouped by post_status gives that view directly.

Draft, Sent, Paid, Refund, and Archived become columns the team works through the week, counts on each column expose the receivable position at a glance, and each card carries the invoice number, the recipient, the total, and the due date so a chase email is one click away. Dragging a card writes via wp_update_post, the same call WP-Invoice makes on a manual mark, so plugin hooks fire normally. Refunded and archived invoices stay visible as their own columns, which is what month-end reconciliation against the bank feed needs.