Guide
How to organize attachments for a payment demand packet
A clean, organized packet helps the recipient understand what you are asking for and why. Use this simple order to avoid confusion.
Published Jan 20, 2026
How it works
Fill out form
Complete the guided fields online.
Preview PDF
Review the generated PDF before mailing.
We print and mail it via USPS.
Recommended order
- Demand letter - Summary, amount due, and deadline.
- Invoice(s) - Each invoice referenced in the letter.
- Contract or scope of work - The agreement that supports the charges.
- Supporting documents - Change orders, delivery confirmations, or timelines.
Organization tips
- Name each attachment clearly (Invoice-123.pdf, Contract.pdf).
- Include a short list of attachments in the letter.
- Keep everything in one PDF to avoid missing pages.
Mailing checklist
- Verify recipient address and contact details.
- Save the packet as a single PDF.
- Keep a copy for your records.
Recommended mailing method
If you need proof of delivery, use Certified Mail with electronic return receipt (First Class only). If the deadline is tight, consider Express (1-3 business days). Certified Mail is only available with First Class.
Certified Mail with electronic return receipt (First Class only)
What you get
- • Attachment organization guide
- • Certified Mail with electronic return receipt (First Class only)
- • First Class or Express delivery options
Which mailing option and proof should you choose?
PostalForm offers U.S. letter mailing with different delivery and proof options. First-Class suits routine correspondence; Certified Mail adds mailing and delivery records, and Electronic Return Receipt adds a downloadable signature record. Expedited delivery prioritizes speed. Review the destination, estimated dates, total price, and required proof before paying.
| Mailing option | Delivery speed | Proof | Use when | Avoid when |
|---|---|---|---|---|
| USPS First-Class Mail | First-Class Mail delivery estimate shown before payment. | Available processing scans; no recipient signature or Certified Mail receipt. | Routine letters when a signed delivery record is unnecessary. | Your instructions require Certified Mail, a signature, or a deadline this estimate cannot meet. |
| Certified Mail | First-Class delivery speed; certification does not make delivery faster. | USPS mailing and delivery/attempt tracking; no Electronic Return Receipt unless added. | You need a recorded mailing and delivery or attempted-delivery status. | You need a downloadable signature record or faster delivery. |
| Certified Mail + Electronic Return Receipt | First-Class delivery speed; signature collection may require redelivery or pickup. | Certified Mail records plus a downloadable USPS signature record when available. | Your instructions call for Certified Mail with Return Receipt or you need the signature record. | Your recipient requires an original enclosure, personal service, or another submission method. |
| Expedited / Express with signature | Faster estimated delivery range shown at checkout; production cutoff and destination apply. | Carrier tracking and signature option; this is separate from Certified Mail and ERR. | Speed and signature matter and checkout offers the service for your destination. | A rule specifically requires Certified Mail or the displayed estimate misses your deadline. |
Availability and delivery estimates depend on the document and destination. Mailing proof does not establish that a recipient accepted a filing or that legal service requirements were met. Delivery estimates · Full pricing
FAQs
- Can I send multiple PDFs?
- It is best to combine them into one PDF packet.
- Do you print attachments?
- Yes. We print everything you upload.
Ready to get started?
Upload your finalized PDF and we will handle printing and postal mailing.