  In the present letter, a particular form of Slavnov-Taylor identities for the
Curci-Ferrari model is deduced. This model consist of Yang-Mills theory in a
particular non-linear covariant gauge, supplemented with mass terms for gluons
and ghosts. It can be used as a regularization for the Yang-Mills theory
preserving simple Slavnov-Taylor identities. Employing these identities two
non-renormalization theorems are proved that reduce the number of independent
renormalization factors from five to three. These new relations are verified by
comparing to the already known three-loops renormalization factors. These
relations include, as a particular case, the corresponding known identities in
Yang-Mills theory in Landau gauge.
