  We theoretically investigate the emergence of lateral (recoil) forces acting
on generic dipole-type emitters in the vicinity of a reciprocal
translation-invariant substrate. Surprisingly, we find that for
linearly-polarized electric dipoles the lateral force invariably vanishes,
independent of the anisotropy (e.g., tilted optical axes) or chirality of the
substrate. We identify a novel opportunity to have a recoil force relying on a
superposition of two linearly-polarized and collinear electric and magnetic
dipoles. Counterintuitively, it is shown that when such an emitter stands above
a uniaxial dielectric half-space with tilted optical axes it may experience a
recoil force oriented along the direction perpendicular to the plane defined by
the interface normal and the substrate optical axis.
