File:Dana Plato signature.jpeg

Summary
The signature of deceased actress Dana Plato.

Source: https://entertainment.ha.com/itm/memorabilia/miscellaneous/-diff-rent-strokes-autograph-lot-signatures-from-co-stars-gary-coleman-dana-plato-todd-bridges-and-conrad-bain-matted/a/612-22102.s

It is a product/item in which it contains the signatures of the cast on Diff'rent Strokes including Plato. Due to this, it is in the public domain, also due to signatures usually being public domain.