That's different than what you said on your website:
note that the Lookup ID is not secret, so you can make it public without any loss of privacy.
This makes it look like you can post the Lookup ID on social media, while it's something to be kept a secret.
By public I meant an insecure channel between two people, but not tweeting it. (If it's tweeted, then some jerk can try to access it with 3 invalid PINs and lock the note.) I have updated the website with a clearer explanation to the question "Do I need to send the PIN by another channel?"
You can send both the Lookup ID and PIN together. However, if you are communicating over an insecure channel and you need to
refer to the share, you can refer to it by the Lookup ID.
For example, Alice writes in an email to her cat sitter Bob:
Hey Bob,
Thanks again for agreeing to feed my cat Luna. You are a lifesaver!
I am sending you the WiFi password in note XYZC, and the gate code in note QCTY.
You will need to use the Crosspass app to get them. Text me when you are at the gate.
Feel free to hang out at my place, Luna could use the company.
Hugs,
Alice
Then, once he arrives at the gate and texts her,
I am at the gate and I have Crosspass. What’s the PIN?
She texts him,
XYZC 1935
QCTY 0382