At Eficent we have developed the module ‘account_invoice_merge’, that allows a company to merge various vendor or cusromer invoices into one.
This functionality is useful in the following scenarios:
1. Our customer requires a single invoice for the services or products provided for a period of time.
2. We issue multiple orders to the same vendors, and ask them to submit a single invoice for all orders issued over a period of time, in order to reduce administrative costs.
In order to merge invoices you just have to select the invoices in the list view and trigger the action Merge invoices
Purchase and sales orders will now make reference to the new invoice.
You can download the module from: