Description:
<jats:p>S-matrix symmetries are operators that commute with the S-matrix and act additively on incoming n-particle states. For relativistic field theories, the structure of such symmetries is known if they arise from a local, conserved current density. In this note it is shown that the same structural result is obtained if a relativistic field theory with finitely many but possibly nonlocal S-matrix symmetries is considered.</jats:p>