When I had my loan aproved, my LO called me and told me that my loan was approved. A few days later, I received the UW's list of conditions. So my guess is that you will pobably receive something in the mail from the UW. I had a lot of conditions. including mailing my paystubs to the UW from time of approval till close of loan, and letter of explanations for inquiries on my CR.
Basicly, you don't get :final" approval until you close. It is called Clear to Close and happens when all the I's are dotted and the T's are crossed by all parties. Just keep in touch and get any conditions satisfied ASAP as they come in.
there will be conditions that pop up all the way until you get a clear to close. 85% of them at this point are procedural, etc. SHould not be a problem in most cases as long as nothing has changed on your end so final verifications go off smooth.