Not impolite - no - just a little awkward!
If you want someone to forward something the simplest way and most natural way thing to say is...Please would you forward the.....
I would like you to forward the ...
A lot will depend if you're speaking or writing. Usually people write more formally than they speak- so it is perfectly OK to say
Can you forward the ...
If you are writing formally you may say
Can I request that you forward the...