Every finance team running Odoo eventually hits the same wall: a customer sends 60% of an invoice, then another payment three weeks later, then a credit note swallows the tail — and the residual, the register outstanding amount, and the partner ledger stop agreeing with each other. Odoo core does support partial reconciliation through account.partial.reconcile and the "Register Payment" wizard, but the out-of-the-box flow is one payment against one move at a time, with no bulk view of what is still open, no guided way to split a single receipt across several invoices in defined proportions, and no first-class handling of a refund that must offset multiple part-paid documents. Accountants end up reconciling line by line in the journal items, second-guessing which amount_residual is authoritative, and re-opening entries at month-end.

We build a dedicated Odoo module that turns partial-payment reconciliation into a controlled, reviewable operation. At its core is a reconciliation engine layered on Odoo's own account.move.line residual mechanics — we never bypass the ledger, we drive it. New models (models.Model with computed @api.depends fields on amount_residual, amount_residual_currency, and reconciliation state) expose a single working surface where a receipt or payment can be allocated across many open invoices, bills, and refunds at once. Each allocation writes proper account.partial.reconcile records so the general ledger, the aged partner balance, and the payment matching all stay consistent. Foreign-currency documents are handled through Odoo's multi-currency residual fields, and any exchange difference is posted to the configured gain/loss accounts rather than left dangling.

Technically, the module ships as a clean addon with its own __manifest__.py declaring dependencies on account (and account_accountant where Enterprise features are in scope), OWL/XML views for the allocation cockpit, a QWeb reconciliation statement you can print or attach to the entry, and optional automated actions (or scheduled ir.cron jobs) that surface documents drifting past a residual threshold. Access is governed by ir.model.access.csv plus record rules so only accounting roles can post allocations, and the whole flow is scriptable through Odoo's XML-RPC/JSON-RPC API for teams that push payment files from a bank or a parallel system. We target Odoo 17.0, 18.0, and 19.0, and we tailor to Community or Enterprise depending on which reconciliation widgets and bank-statement tooling your edition provides.

Because this is build-to-order, nothing is pre-listed on the Odoo App Store — we build your version to your chart of accounts, journals, and reconciliation rules. Engagement starts with a short scoping call to confirm data model, edge cases (write-offs, over-payments, multi-currency, inter-company), and acceptance criteria; we then develop on a staging copy of your database, run UAT with your team, and deploy with a rollback plan. Typical delivery is 2–4 weeks from confirmed scope. Pricing starts from $249 (indicative, single-company base scope); multi-company consolidation, additional currencies, bank-file import integrations, and larger historical data-migration volumes increase the quoted scope.