datestamp - date stamp pdf on download -

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i have pdf users can download. however, need have date downloaded in text on pdf.

is there way insert "date now" stamp on pdf dynamically added on opening?

perhaps can add javascript pdf?

you can sign , timestamp pdf on server before giving user. signing can performed once day (unless need finer granularity if timestamp time). reliable way put timestamp pdf. also, signature can removed, , if want add watermark can't removed, different story.


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