How do you say the following in german?
"Here are (attached) the requested documents " Hier sind die verlangten Unterlagen??????
"I've attached the requested documents "
or something of that sentiment. Whatever you feel like sounds most natural when sending documents per email (and applying for a job)

Question

Answer

"Im Anhang finden Sie die benötigten Unterlagen" - "You can find the required documents in the attachment" 
"Die von Ihnen angeforderten Unterlagen habe ich angehängt." - "I have attached the requested documents to this email" 
"Die geforderten Unterlagen habe ich im Anhang beigefügt" - "I added the requested documents in the attachment"

Those three are the ones I probably use most :) Hope this helps!

Answer

Im Anhang sende ich Ihnen die angeforderten Unterlagen. :)