Wishpicks never stores or shows a delivery address, so there's no address for anyone to see. But anything you type into a wish note is visible to everyone who can open that wishlist.
There's no address, postal code, recipient name, or phone field anywhere on Wishpicks. Personal details only show up if you type them into a wish's description or notes yourself, and then they're as visible as the wishlist they're on.
Who can see what you write
Anyone with the link (the default): anyone who has the link can open the list and read every wish note. It isn't listed on your profile or shown in search, but the link can be forwarded to anyone.
Public: anyone can view it, and it also shows on your public profile.
Invite only: only you and the people you've invited by email can view it.
In every case, a viewer sees the wish names, prices, images, notes, and tags. So a note is only as private as the list.
Tips
Because the default list is Anyone with the link, treat a wish note like something a stranger could read. Keep your address out of it, and share real delivery details privately instead.
For how to do that safely, see How to safely share delivery details.
Want a note that's safe to leave on the list? See Where should I write delivery information?.