Waiting on documents — Follow-up 1 — short nudge
A few days after the request, before the deadline. Assume the email was buried, not ignored.
Subject: Re: [matter] — still missing [number] items
Hi [First name], Quick nudge on the documents for [matter]. Still outstanding: - [Missing document 1] - [Missing document 2] [Upload link] If any of these are hard to get hold of, reply and tell me which — there is usually another way. [Your name]