Logistics and Shipping
Questions about sample packaging and shipment
Table of Contents
What is the shipping address for sending samples?
Why do you only provide the shipping address after my request is accepted?
We follow this process for quality control and safety reasons:
- We first review each sample request to ensure we can properly process the materials you plan to send. This prevents situations where samples might be shipped that we cannot handle due to technical limitations or safety concerns.
- By reviewing in advance, we ensure that all the necessary information regarding the handling of the samples, such as the storage and preparation of the samples in the glovebox, is available and that the samples can be handled properly on arrival.
- Different samples may require different documentation, especially for international shipments.
How much sample material should I send?

Recommended Amount:
- 30-50 mg of sample material is typically recommended
- It's better to provide slightly more material, especially for samples that are statically charged, as this makes loading easier
Requirements:
- It is possible to work with less than 30 mg, but the sample wells must be completely filled
- For low-density samples, even 10–20 mg might be sufficient
- The critical factor is filling the sample holder wells, which are approximately 2.5 mm diameter and 1 mm thickness

It's helpful to compare your available sample volume with the pictures in the shipping instruction guide
- Samples should be in powder or polycrystalline solid form
- For shipping, use transparent glass or plastic containers with at least a 5 mm opening and a maximum length of 5 cm
- Labels should be printed and partially placed so the contents remain visible
Remember that the samples cannot be returned after measurement, so it's advisable to send only the amount required for 1–2 measurements (just in case).
Do I need to include a proforma invoice with my shipment?
For shipments from outside the EU:
Yes, you must include a proforma invoice (example here) with your shipment if you are sending samples from outside the European Union. The carrier may ask for it when the package is sent. For customs purposes, you should declare a minimal value, typically €1 or $1 per sample, to avoid excessive import taxes. This document is essential for customs clearance and should be:
- Attached to the outside of the package (not placed inside)
- Clearly visible for customs officials
- Printed rather than handwritten (though tracking numbers and certain details may be added by hand if necessary)
- Please send a copy to us at team@momentum-transfer.com
For shipments within the EU:
No proforma invoice is required for shipments between EU member states, as these are considered internal transfers within the single market.
What should the proforma invoice include?
If sending from outside the EU, your proforma invoice (example here) should contain:
- Sender details: Your full name, institution, address, and contact information
- Recipient details: Our complete address as provided in the "Request Accepted" email
- Sample description: Brief, accurate description of the contents (e.g., "Research samples for scientific analysis")
- Quantity: Number of samples included
- Declared value: To minimize import taxes, declare a minimal value of €1 or $1 per sample
- Shipment reference number: The tracking number provided by your courier
- Total invoice amount: The total declared value of all samples
- Statement of purpose: Indicate "Samples for scientific research - No commercial value"
Why is the declared value important in the proforma invoice?
What if I don't include a proforma invoice?
Without a proper proforma invoice, your shipment may:
- Be held at customs
- Incur significant delays
- Potentially be returned to sender
- Result in additional fees or taxes
Can I use my institution's official proforma invoice template?
Where can I find a proforma invoice template?
How should I prepare and package my samples?
What shipping carrier should I use?
Can the samples be returned after measurement?
What should I do if I have issues with shipping?
If you encounter any issues with shipping, please contact us immediately at team@momentum-transfer.com. We will do our best to assist you and provide guidance on how to resolve the situation.