[TeMPOraL]

This may be a benefit in this case, as sneaky edits to a JPEG full of text will show up as a difference in patterns of artifacts - original text will be compressed twice, while the edits just once (or once and zero if they save the edited image to PNG). Takes a bit of time and skill to make this unnoticeable.

[waheoo]

Ok fine I'll add a watermark too.

I'll also take a copy along with me just in case.