The courier didn't even write that detailed. I just write down the address, recipient and phone number. The sender's address, name and telephone number. Do it. I haven't written anything else. It's best to be safe for important things.

The list can prove that you mailed something, which is no problem. Generally speaking, it is safer.

In this case, you can only resign yourself to fate. You can enter the single number on the website of the courier company to check your shipping status.