I can't say I recall making the mistake of not checking my hops, although I've made beer with hops of unknown AA%.
Any experience with hops of unknown AA% AND unknown variety? Got an ounce as swag from a comp.
With an ounce there's not much you can do. Smell them, if you like the smell use them late or for dry hopping. Or as Denny said, toss them, that's fine too.
My only experience with unknown hops as when we brewed at an old hop farm and picked the hops that were growing wild on the telephone poles in the area. The smelled ok going in. The guys who were in charge of the fermentation didn't like it so they tossed it without letting anyone else taste it. We still give them grief over that.