Use cases · Legal
Electronic signatures for law firms and legal teams
Send engagement letters, retainers and settlement agreements for signature and get back a record you can stand behind: a PDF sealed with a digital signature and an RFC 3161 trusted timestamp, with an audit certificate drawn from a hash-chained trail of every step.
3 documents a month free. No credit card.
Documents legal teams send for signature
Engagement letters
Scope, fees and terms of the engagement signed by the client before work starts.
Retainer and fee agreements
The client's signature, date and initials on every page that needs them.
Conflict waivers
A client's informed consent to a conflict of interest, confirmed in writing and signed.
Settlement agreements
Several parties signing in the order you set, with counsel for each side added as a signer or a copy recipient.
NDAs
Mutual and one-way confidentiality agreements, often signed within the hour.
Corporate approvals
Board consents, shareholder resolutions and officer certificates for business clients.
Free templates to start from
Mutual NDA template
Both sides agree to protect what the other shares while they explore working together.
Each has a plain-language note on every section, downloads as Word or PDF, and can be sent for signature from SignThis. See all free templates.
How a sealed engagement letter comes together
Step 1: Upload the approved letter
Upload the PDF exactly as approved. When you send it, the file and its fields are frozen; any change means a new version that everyone signs again.
Step 2: Place fields and set the order
Add the client and the signing attorney, mark signature, initials and date fields, and decide who signs first.
Step 3: Add an access code
Require a code you give the client by phone, so a forwarded email on its own doesn't open the document.
Step 4: Keep the evidence
The sealed PDF carries its own digital signature and timestamp. The audit certificate lists each step: sent, opened, consented, signed and sealed. Anyone holding the file can check it in a PDF reader or on the verify page, without uploading it.
What legal teams rely on
Tamper-evident audit trail
Every step is written to a SHA-256 hash-chained log, so a removed or edited entry shows up.
Verification without uploading
Anyone you give a sealed PDF to can check its fingerprint on the verify page. The file stays on their computer.
Audit record export
Download a document's verified audit record as a CSV for the matter file.
Audit CSV export is included from Professional, and on every business plan.
Encryption at rest
Documents, signatures, names and audit details are encrypted with AES-256-GCM before they're stored, with separate keys for each document.
Good to know before you send
- In the US, the ESIGN Act doesn't cover wills, codicils and testamentary trusts, adoption, divorce and other family-law matters, or court orders and filings. Those follow their own rules.
- SignThis doesn't notarize. Documents that must be notarized or recorded need a notary.
- A signer is identified by their personal email link and, if you set one, an access code. SignThis doesn't check identity documents, so decide whether that's enough for the matter.
- The Security page explains how documents are protected and what the design doesn't cover, so you can weigh it against your confidentiality duties.
This is general information, not legal advice, and the rules differ between countries and states. For everything SignThis doesn't do, see what SignThis does not have.
Common questions
Is an e-signed engagement letter binding?
In the US, the ESIGN Act and state UETA laws generally give electronic signatures the same legal effect as handwritten ones when the parties agree to do business electronically. SignThis records each signer's consent to sign electronically in the audit trail. Exceptions apply, and the rules differ outside the US.
What proof do I get that a document was signed?
A sealed PDF with a digital signature (PAdES) and an RFC 3161 timestamp, plus an audit certificate listing each step with its time. The seal makes any later change to the file detectable.
Can the other side's counsel sign too?
Yes. Add every party as a signer in the order you need. Signers don't need a SignThis account.
How much does SignThis cost?
The free plan sends up to 3 documents a month, with no payment card and no end date. For more, plans start at $8 a month, billed monthly with no annual commitment. Signing is free for the people you send to. See every plan and its limits.