Hello Mark, and thank you for posting to our community!

I'm sorry to hear your customer has not received their shipment.

Once your First Class International merchandise shipments arrive at the consolidator, they are processed through customs and then shipped on to their country of destination. 

However, because of the budget rates for this service, international tracking to the destination countries border may or may not occur and will often depend on the country.

While our consolidator has informed us it would be safe to assume a shipment is on route to it's destination after approx 1-4 days depending on customs, we do not have any additional information to confirm that with.

If international tracking is a must need for your business, we would instead recommend using the Priority Mail Express International service, Priority Mail International service, or First-Class Package International Service. Those services are described in more detail in the link below.

What options do I have for international shipping?

Thank you.