  We identify string corrections to the EM memory effect. Though largely
negligible in the low-energy limit, the effect become relevant in high-energy
collisions and in extreme events. We illustrate our findings in a simple
unoriented bosonic string model. Thanks to the coherent effect of the infinite
tower of open string resonances, the corrections are non-perturbative in
$\alpha'$, modulated in retarded time and slowly decaying even at large
distances from the source. Remarkably compact expressions obtain for special
choices of the kinematics in tree-level 4-point amplitudes. We discuss further
corrections occurring at higher-points and the exponential damping resulting
from broadening and shifting of the massive poles due to loops. Finally we
estimate the range of the parameters and masses for detectability in
semi-realistic (Type I) contexts and propose a rationale for this string memory
effect.
