A common term for a boy or girl who is looking for a shidduch is to describe him / her as being "in the parsha".
When I tried to arrange a shidduch for my son, the shadchanit said, "I have two nice girls, both in the parsha." I assume that they are both in the same parsha by the phrasing she used, otherwise, she would have said "they are in different parshiot". When I asked her which parsha they are in, she wouldn't tell me.
I think that parents and my son should at least know which parsha the girls are in, no? I mean, there are certain parshiot that I wouldn't want a girl to be in such as Bechokotai or Ki Tavo because they both have the list of "curses" in them. I also wouldn't want a girl in parshat Balak.
So, what's the deal? Is there some halacha that forbids a shadchan from revealing the parsha?