I want to use LaTeX to typeset a multi-page contract; in such contracts it's a common practice for parties to sign all pages, except the last one where “main” signatures are written.
However, signing each page of a long contract (for example, the one verbosely describing technical details of the work under the agreement) is hard; it's okay to print contract two-sided and let parties sign each paper sheet instead.
So, the question itself is: how can I set up different footer heights for odd and even pages? I want my even pages have a bit more free space for signatures and stamps. Moreover, if the page with main signatures happened to be odd, its footer should be narrow, not wide.
Is there a way to achieve this layout?