yep

https://forums.d2jsp.org/topic.php?t=105515517&f=122

Example if you are buying 20divs:

List a useless rare item on PoE 2 trade site for 20div > Copy your trade link > Paste it into the private message of the seller here on jsp, send > Wait for seller to contact you ingame > Hand over rare item while seller gives you the 20 div > Send fg to seller. Or vice versa if you are the one selling divs.

this but I prefer to copy paste the page link (http...) rather than the whisper message because it allows the 'fake' buyer to click by himself on the 'direct whisper' button which then links the item properly ingame. Could be dumb but I feel like this makes it look more legit.

also pro tip: change area ingame to have poetrade update (if you don't do this it takes a while for your item to appear on poetrade).

very important indeed.