If your PostNL shipment is stuck in customs, first check the Track & Trace page and respond immediately if PostNL asks for extra information about the package contents or value.
Customs clearance cannot proceed without these details, and parcels may remain held until the information is submitted.
Another common delay is unpaid import duties or VAT, which PostNL usually requests after the parcel arrives.
Paying the customs invoice online as soon as you receive the notification can speed up release and move the package to delivery.
If the tracking status has not changed for weeks, contact both PostNL support and the sender to confirm that the commercial invoice and customs declaration were filled correctly.
If support does not reply, you might want to consider posting a complaint on Xolvie in order to bring attention to the issue and try to find a solution.
Related Complaints
PostNL Package Stuck at PTT Since December Despite €20 Declared Value

I sent a gift package from the Netherlands to Turkey through PostNL, containing items worth about €20. However, my shipment has been showing “waiting at the PTT office” since December 6, and no progress has been made with the delivery. When I called PTT customer service, they told me that shipments...