for example I have a PDF, a client buys it off me but its only valid for 12 months so after 12 months I don't want them to be able to open the file anymore.
does anyone know if this is possible?
for example I have a PDF, a client buys it off me but its only valid for 12 months so after 12 months I don't want them to be able to open the file anymore.
does anyone know if this is possible?