Version: Odoo 19 Enterprise
We understand that draft purchase receipts are automatically synchronized with the related Purchase Order on a scheduled basis. Any manual changes made directly on a draft receipt can therefore be overwritten — even if the PO itself has not been modified.
Our setup:
Large Purchase Orders
Deliveries happen in multiple partial shipments over time
The PO quantity remains fixed and confirmed
Each receipt represents one physical partial delivery
Before goods arrive, we sometimes receive supplier confirmation about quantities in the next shipment
We adjust the draft receipt to reflect that upcoming delivery
Later, the receipt quantities are reset to match the PO again
Odoo Support recommends updating quantities on the PO and using receipts strictly for physical validation.
However, in a multi-delivery scenario this creates some practical challenges.
So my question to the community:
How are you handling partial deliveries operationally in standard Odoo?
Do you adjust PO quantities per shipment?
Do you split large POs into multiple smaller POs?
Do you avoid preparing receipts in advance?
Is there a standard approach for planning upcoming deliveries without validating receipts before goods physically arrive?
We want to stay fully within standard Odoo processes and avoid customizations, but with larger multi-delivery POs this behavior makes operational planning difficult.
Interested to hear how others manage this in practice.

>> planning upcoming deliveries without validating receipts before goods physically arrive
Why are you validating receipts before goods physically arrive?
Edit the Receipt to add the Date it is expected to arrive (and quantities if needed) for planning, then validate only when goods arrive, with an automatic back order for the remaining quantity. Don't edit the Purchase Order. Repeat until everything has arrived.