By mistake I ordered the wrong (paper) passes, so I decided to return the passes. On the website I confirmed the returning of the passes for a refund and I got an adress to return the passes to. There was a return number there that I had to put on the envelope, but I didn't write it down immediately and now I can't find the number anymore. I didn't got an e-mail with a confirmation of the returning and the return number either.
Can anyone help me? I do have the adress so I could send it without the return number, but that feels a bit risky.
Thanks in advance!