If your shipping company requests proof that your specimens are not infectious, a simple note from your doctor will usually suffice: ” SAMPLE SPECIMEN IS NON-INFECTIOUS AND NON-HAZARDOUS “
Shipping regulations are complex and may not correspond to “common sense”. For example, a licked envelope used for shipping purposes does not require certification. However, the exact same envelope being sent to our laboratory for analysis could require certification that it is not infectious.
FedEx and DHL locations in major cities are more likely to request certification than your neighborhood post office. It somewhat depends on the particular staff member, the latest news of disease outbreaks, how you describe your shipment, and whether you’re sneezing or coughing at the shipping counter.