How do you re-fasten a strike plate to a wood door jamb where the jamb has deteriorated and the screw holes don't exist anymore?

Answer 1

first remove the striker plate if any screws are still holding it, drill out the old screw holes to at least twice the dia. of the screws , get hardwood dowels of the same size as the new holes put wood glue in the holes then tap in the dowels, wait for the glue to dry, sand the dowels to the same depth as the jamb,replace the striker.

For a quick fix, cut stick matches (don't use the head of the match) to the depth of the holes, push them into the holes and re-install the strike plate.