Account Payment Paired Internal Transfer

This module makes internal money transfers between your own bank or cash accounts easier to record.

On the payment form, when the payment is marked as an internal transfer, a new "Destination Journal" field appears. You can only pick a bank or cash journal belonging to the same company and different from the source journal; the field is required for internal transfers and becomes read-only once the payment is no longer in draft. A message on the form warns you that a second payment will be created automatically in the destination journal.

When you post the internal transfer, Odoo automatically creates a paired payment in the destination journal with the opposite direction (an outgoing transfer generates an incoming one, and vice versa), swapping the source and destination journals. The paired payment is posted immediately, and both payments are cross-referenced through a dedicated field, with a note added in each payment's chatter linking to the other one. Finally, the liquidity lines of both payments are reconciled so the transfer is complete in one step.

The module extends the account.payment model and the standard payment form view. It does not add new menus or reports.