Polite way to ask about something that I previously requested


Say I have the sentence below about papers I requested previously. (as I am
reminding somebody that I haven't received something)

> 先日{せんじつ}に頼{たの}んだ書類{しょるい}ですが・・・

Is there any way to make a sentence like this more polite (humbling)? Do the
below sentences make sense or is there a better way?

> 先日{せんじつ}にお頼{たの}みした書類{しょるい}ですが・・・
>
> 先日{せんじつ}にお願{ねが}いした書類{しょるい}ですが・・・




I would say "先日、お願いした書類ですが".

"お頼みした" sounds funny (to me.)

