Same PDF, two freelancers. One sends "deliverable_final_v2_FINAL.pdf" as an unprotected attachment. The other sends "AcmeBrand_Strategy_2026-03.pdf", password-protected, with a clear covering email. The second freelance gets paid 30% more.
Presentation matters.
Name files thoughtfully
Use consistent, professional naming: `[Client]_[Project]_[Date].pdf`. Sortable, identifiable, and signals attention to detail. Versioned filenames (`v1`, `v2`) where multiple versions exist. "Final" and "FINAL_v2" never feature in a professional file name.
Compress before sending
Large attachments feel like the freelancer didn't think about it. Compress PDF to a sensible size — under 10MB unless the work genuinely needs more. The compressed file still looks polished at viewing size.
Protect sensitive content
For confidential strategy work or work-in-progress, password-protect the file. Send the password via a different channel. This signals seriousness about the work without being theatrical.
The covering email
Short and specific. "Hi [Name], attached is the brand strategy deck as discussed. The password is [hint, not the password]. Happy to talk through it on a call this week if useful." Three sentences max. Long covering emails feel apologetic.
FAQ
Should I send PDFs via email or a portal?
For one-off delivery, email is fine. For ongoing client relationships, a shared folder (Dropbox, Google Drive) keeps everything in one place.
When should I password-protect?
For confidential work, drafts, and anything not yet paid for. Routine final deliverables to long-term clients don't always need protection.
What if the client can't open the protected PDF?
Provide the password in a clear way (separate channel) and offer a phone walkthrough. Some clients aren't comfortable with passwords; meet them where they are.
Should I follow up after sending?
Yes — a brief check-in a few days later if you haven't heard. Don't chase before then.
Presentation compounds over years of work. Use Flint for the polish — naming, compression, protection — that signals professionalism.