If you choose to send them all together, you can use the tracking number provided by the courier or mailing service to check the status of the samples.

If you choose to send them one by one, you should contact the recipient to confirm receipt after each sample is sent. In short, whether you choose to send them one by one or all at once, you need to pay attention to the safety and accuracy of the samples. By considering factors such as shipping method, sample type and quantity, packaging and marking, and tracking and confirmation, you can ensure that the samples arrive at their destination smoothly and obtain accurate test results.