No waiver or confidentiality excuses were given. I was told that they subscribe to VirtualEvals which is why they wouldn't send to interfolio. They also said that they couldn't send the letter to interfolio because they send letters by PDF, however, on the letter service website, they state that they send paper letters to the optometry application letter service.
There is nothing wrong with VirtualEvals. My issue is that VirtualEvals sends the whole packet of letters that I have built up (~7 letters). Since my school doesn't have a pre-med committee, I'm left meeting the individual letter requirments for each school and interfolio can let me specify which letter goes where. If my school did have the committee letter, I would be more than happy to use VirtualEvals.
I am so fed up with the advisors and letter people at my former school. They have been utterly useless. Part of my desire to get my letters to interfolio is so that I will never have to deal with those clowns agian.