The ornamental design for a bezel for a documentvalidator, as shown and described.
FIG. 1 is a front elevation view of the bezel for the document validator according to the new design;
FIG. 2 is a rear elevation view;
FIG. 3 is a right side elevation view;
FIG. 4 is a left side elevation view;
FIG. 5 is a plan view;
FIG. 6 is a bottom view;
FIG. 7 is a front perspective view from the right upper side;
FIG. 8 is a front perspective view from the left upper side;
FIG. 9 is a rear perspective view from the right upper side;
FIG. 10 is a rear perspective view from the left upper side; and,
FIG. 11 is a front right perspective view of the bezel attached to the document validator with the document validator shown in broken lines. The portions illustrated in broken lines are environment that forms no part of the claimed design.