Comment on ``Magnon wave forms in the presence of a soliton in two--dimensional antiferromagnets with a staggered field''

Very recently Fonseca and Pires [Phys. Rev. B 73, 012403(2006)] have studied the soliton–magnon scattering for the isotropic antiferromagnet and calculated ``exact’’ phase shifts, which were compared with the ones obtained by the Born approximation. In this Comment we correct both the soliton and magnon solutions and point out the way how to study correctly the scattering problem.