Although inelegant, attorney fees is becoming more common — presumably to avoid making a decision on the apostrophe altogether. The one variant to avoid at all costs is *attorneys fees, which is a possessive form with the apostrophe wrongly omitted.

What is the plural of attorney?

The plural of "attorney" is "attorneys." You may have in mind the rule that English nouns ending in "-y" change the "y" to "i" before adding "es" to make the plural form, but this rule applies only when the sound/letter preceding the final "-y" is a consonant, e.g., "city/cities" and "dummy/dummies." The "e" in " ...

What is the possessive of Attorney General?

Why is it “Attorneys General” (plural) but not “Attorney's General” (singular possessive)? With “Attorney General,” general modifies the noun attorney. Thus, when there is more than one Attorney General, you would write “Attorneys General.” This makes sense.