In multicompany, it can happen that one company (let's call it company Origin) cannot handle a payment method in their country, so it uses another company's (company MoneyHandler), even if it's in another country. The accounting flows must be then adjusted:

- In company Origin, the invoice must be matched by a clearing entry
- In company MoneyHandler, payment must match its move (if it exists) with a clearing entry. The payment move doesn't exist if `account_accountant` is installed but no Outstanding account is configured on the payment method line.

Same but opposite thing must happen for credit notes in company Origin that match a reimbursement in company MoneyHandler.

Cancellation of a payment must be reflected on the entries: deleting when feasible, reversing when not (unless a lock date/hash is present, which would block the cancellation)

_(To do: testing/review, credit note, cancellation/reversal of the payment)_

Task [link](https://www.odoo.com/odoo/project.task/6037525)
task-6037525