Which address was used?
Not the address in the contact record today — the one this letter was actually sent to, as it read at the moment it was sent.
For law firms
Physical legal mail,
sent from your browser.
Send and track legal correspondence by physical mail. Upload a PDF, choose a mail class, and send — then keep an append-only, tamper-evident record of every mailing event observed, with the recipient address frozen at send time.
send.legal records observed mailing events. Your firm determines their legal significance.
One mailing, after it’s sent — illustration
Mailing Record
Record number MR-2026-0814-037
- Created
- 14 Aug 2026, 9:02 AM EDT
- Document
-
demand-letter.pdf · 4 pages
sha256:9f2c…a017
Preview document (short extract)
Fictional document, shown for illustration. send.legal does not write the letter — the firm uploads it. Ashford & Lane LLP
Re: Fictional matter reference
Dear Mr. Avery,
This firm represents the claimant in the above-referenced matter. We write regarding the outstanding balance described in the enclosed schedule and the obligations set out in the agreement dated 3 March 2026.
Should the matter remain unresolved after that period, our client has instructed us to…
Page 1 of 4
- Mail class
- USPS First-Class Certified with electronic Return Receipt
- Recipient address
as at send time -
Jordan Avery
1120 Example Ave, Suite 400
Springfield, IL 62704 - Tracking
- 9407 1000 0000 0000 0000 00
Observed events
-
Entered mail stream
provider 15 Aug 2026, 7:48 PM EDT
recorded 15 Aug 2026, 8:02 PM EDT Source: USPS, via mailing provider -
Recovered event. Out for delivery
provider 18 Aug 2026, 8:11 AM EDT
recorded 18 Aug 2026, 1:55 PM EDT Source: USPS, via mailing provider · recovered during reconciliation, not received in real time -
Delivered — signed for
provider 18 Aug 2026, 2:23 PM EDT
recorded 18 Aug 2026, 2:41 PM EDT Source: USPS delivery scan, via mailing provider
- First-Class, Certified, and Certified + electronic Return Receipt
- Every event carries the provider's clock and ours
- The recipient address is frozen at send time
- Audit history exports with its hash chain
01 / What you are actually buying
The mailing is the action. The record is the product.
Today the task is getting the letter out the door. Months later the questions are different ones, and they are asked by someone who was not there.
Which mail class was selected?
First-Class, Certified, or Certified with an electronic Return Receipt, recorded against the mailing rather than remembered.
What did the provider report?
Each status exactly as it was reported, attributed to whoever reported it, in the order it arrived.
When did we record it?
Separately from when the provider says it happened. Those two clocks genuinely differ, sometimes by days.
What did the letter actually say?
The document you uploaded, and the pages as the printer produced them — cover sheet, address panel and all. Both are captured at send time, so the record can show what went in the envelope rather than what was meant to.
Can I still open it?
Until your firm’s retention window closes. After that the document contents are destroyed on purpose — and the record says the letter was purged, which is a different statement from never having had one.
02 / The record
What a mailing looks like after it’s sent
An illustration, with fictional details. Every field below is one the product records for a real mailing.
Mailing Record
Record number MR-2026-0814-037
- Created
- 14 Aug 2026, 9:02 AM EDT
- Matter
- Fictional matter reference
- Document
-
demand-letter.pdf · 4 pages
sha256:9f2c…a017
Preview document
Fictional document, shown for illustration. send.legal does not write the letter — the firm uploads it. Ashford & Lane LLP
Re: Fictional matter reference
Dear Mr. Avery,
This firm represents the claimant in the above-referenced matter. We write regarding the outstanding balance described in the enclosed schedule and the obligations set out in the agreement dated 3 March 2026.
Please respond in writing within thirty (30) days of the date of this letter. Correspondence may be directed to the undersigned at the address above.
Should the matter remain unresolved after that period, our client has instructed us to…
Page 1 of 4
- Mail class
- USPS First-Class Certified with electronic Return Receipt
- Recipient address
as at send time -
Jordan Avery
1120 Example Ave, Suite 400
Springfield, IL 62704 - Tracking
- 9407 1000 0000 0000 0000 00
- Audit chain
- firm_seq 1184 · prev 4c81…9be2 · event 77af…10dc
Observed events
-
Handed to mailing provider
provider 14 Aug 2026, 9:02 AM EDT
recorded 14 Aug 2026, 9:02 AM EDT Source: send.legal -
Printed and mailed
provider 15 Aug 2026, 6:14 AM EDT
recorded 15 Aug 2026, 6:31 AM EDT Source: mailing provider -
Entered mail stream
provider 15 Aug 2026, 7:48 PM EDT
recorded 15 Aug 2026, 8:02 PM EDT Source: USPS, via mailing provider -
Recovered event. Out for delivery
provider 18 Aug 2026, 8:11 AM EDT
recorded 18 Aug 2026, 1:55 PM EDT Source: USPS, via mailing provider · recovered during reconciliation, not received in real time -
Delivered — signed for
provider 18 Aug 2026, 2:23 PM EDT
recorded 18 Aug 2026, 2:41 PM EDT Source: USPS delivery scan, via mailing provider
Timeline coverage: incomplete One update was not received when it occurred and was recovered afterwards by querying the provider directly. One or more intervening provider events may be absent from this timeline. This record contains only events that were observed.
03 / Sending
Three steps, then the record keeps itself
About three minutes from a PDF on your desktop to a letter in the mail. Everything after that happens without anyone doing it.
-
Step 1 Attach the recipient
Pick a party on the matter, or anyone in the firm address book. The address is copied, not linked — editing the contact later cannot change what this record says was on the envelope.
-
Step 2 Upload the PDF
It is hashed on arrival and checked for the things that make a physical mailing fail: page size, page count, and anything sitting where the address panel prints.
-
Step 3 Choose a class and send
First-Class, Certified, or Certified with an electronic Return Receipt. The price is shown before anything is submitted. From here the record keeps itself.
And then, without anyone doing anything
A real letter, in the mail
Printed, folded, enveloped, postmarked and carried by USPS as the class you chose. Nobody at the firm handles paper, buys postage, or queues at a counter.
A timeline that writes itself
Every event the print vendor and USPS reported — accepted, printed, entered the mail stream, out for delivery, the delivery scan and the name it was signed for — each carrying the time it was reported and the time we recorded it. And marked incomplete if anything expected was never observed.
04 / Why this record is different
Six decisions you would otherwise have to make yourself
- Two clocks, never merged
- Every observation stores the time the provider supplied and the time send.legal recorded it. A vendor's poll is not a carrier's scan, and the record does not pretend otherwise.
- A frozen address
- Editing a contact next March cannot alter what last August's record says was on the envelope.
- An append-only history
- Events are added, never edited or reordered. Each firm's audit history is linked with SHA-256 hashes, and the exports carry the chain so it can be checked without us.
- Gaps are reported, not filled
- When coverage of a timeline cannot be substantiated, the record says so rather than inferring an event nobody observed.
- Status is never promoted
- A provider's "completed" is an approximation and is recorded as an estimate. Only a USPS delivery scan is recorded as delivered.
- Retention destroys contents, not records
- Your firm sets how long document contents are kept. When they are purged, the mailing, its timeline and its audit history remain.
05 / Around the mailing
Built for how a firm already works
Matters and parties
Mail belongs to a matter, not to a tracking tab in someone's browser.
Firm address book
Shared contacts and matter parties that seed the composer — and never rewrite a sent record.
Letter templates
Merge fields filled from the matter. Substitution only; an unresolved field stays visible rather than vanishing.
Batch recipients
One document, many recipients, each its own mailpiece with its own tracking and its own record.
Mail-by deadlines
A date the mailing has to be out the door by, tracked against the matter.
Cost-recovery export
Per-mailing costs as CSV, so a hard cost reaches the client ledger instead of the firm's overhead.
06 / What we do not claim
The things this product will not tell you
Whether a mailing constitutes valid notice or service depends on the applicable court rules, the statute, the jurisdiction, the type of proceeding, the recipient, and the required method. We control none of those six things, so we make no claim about any of them. USPS itself describes Certified Mail in terms of mailing receipts and delivery verification rather than as universally establishing legal service; if the Postal Service will not make that claim about its own product, we will not make it about ours.
- We say tamper-evident, not immutable. A hash chain held by one operator cannot prove that operator never wrote a false statement at insert time. It can prove the sequence has not been altered since.
- A Certified Mail record concerns mailing and delivery history, not the contents of an envelope.
- An electronic Return Receipt is an electronic record, not a physical green card, and we do not tell you whether one substitutes for the other.
- We report what a provider said and when we heard it. We do not independently verify that the provider was right.
The attorney supplies the legal conclusion. That division is the product, not a hedge.
07 / Questions
Before you ask
Does send.legal determine whether a mailing meets a legal requirement?
No. send.legal is mailing and recordkeeping software, not a law firm. It sends physical mail using the mail class your firm selects and preserves observations about that mailing: the recipient address captured at send time, events reported by the mailing provider, and when send.legal recorded each of them. The record preserves those observations; it does not decide their legal significance.
Your firm is responsible for choosing the mailing method and deciding whether the timing, the documentation, and the available postal records are appropriate for the applicable rule, court, contract or matter.
We already send Certified Mail. Why change anything?
Keep sending it — Certified Mail is one of the mail classes available here. send.legal does not replace postal tracking with a new delivery category. What it adds is the record around the mailing: the address as selected at send time, the class chosen, each provider-reported event with both timestamps, the printed proof as it went out, and the exports that come from all of it.
What if the provider misses an update, or the timeline has a gap?
Then the record says the coverage is incomplete. Provider events are captured as they arrive and reconciled afterwards to recover anything missed in real time. If something expected still was not observed, the timeline is marked incomplete rather than quietly closed. send.legal does not infer a status it did not observe — and a missing event does not establish that the underlying postal event failed to happen.
What happens to our records if send.legal goes away?
Mailing Record PDFs and CSV/JSON audit exports are built to be kept outside the product. The JSON export carries each entry's hash, the preceding hash, and the chain head, so a third party can check whether an exported sequence has been altered without a live account here. Download and retain what matters to your firm on your own schedule rather than treating any hosted account as permanent storage.
Will this pass our IT review?
There is a page of specifics for exactly that conversation. In short: firm boundaries are enforced by the database itself, stored documents are encrypted with a per-object key, document downloads pass through the application and are audited, and sign-in supports passkeys and authenticator apps with role-based access.
send.legal is not SOC 2 certified and does not claim HIPAA compliance. If your policy requires a certification we do not hold, ask before approving the product rather than after. Read the security page.
Does this replace our practice management software?
No, and it is not trying to. send.legal handles physical mail and the record it produces. It sits beside whatever your firm already uses to run matters.
Send the letter today. Answer the questions about it next year.
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