For a start any services are at the ladies discretion so that doesn't even have to be put in the fav list.
And how do you propose it is verified that she doesn't do A,B or C "At all" ?
Youre saying that if she French Kissed one client ,you don't have a problem with her listing it I assume.
Either the lady tells you she doesn't French kiss and avoids any complications ...or she tells you "yeah I French kissed the last 10 clients but im not doing it with you"
Don't tell me you wanna hear the second option