  I consider the fulfillment of conservation laws and Ward identities in the
one- and two-loop functional renormalization group approach. It is shown that
in a one-particle irreducible scheme of this approach Ward identities are
fulfilled only with the accuracy of the neglected two-loop terms O(V^3) at
one-loop order, and with the accuracy O(V^4) at two-loop order (V is the
effective interaction vertex at scale \Lambda). The one-particle
self-consistent version of the two-loop RG equations which leads to smaller
errors in Ward identities due to the absence of the terms with non-overlapping
loops, is proposed. In particular, these modified equations exactly satisfy
Ward identities in the ladder approximation.
