I'm ok with someone saying "Can I assume what's currently posted on your site is correct?" and I'll know he's referring to my donation. A simple yes or no from me is all this requires, and, of course, it would be "yes".
I'm also ok with "I saw the special you were running on *insert site here* today and I'm wondering if that's what I should expect when I arrive?" Again, a simple yes or no answer will do, depending on if I'm running a special that day. If I'm not, I'll refer him to my site.
I think it's best to keep that part of the encounter as brief, and to the point, as possible. That way there's no confusion.
A lady should honor what she has posted on her site at all times, with no exception or excuse. However, if you gents are looking at an ad she ran a month ago (or even a week ago) offering a special, it's best to find out right away if that's still applicable.
Hope this tidbit of info helps you guys out.
~ Staci