Tamper-evident.
Every signed PDF is cryptographically sealed. Change one character afterward and the signature breaks.
sign multiple engagement letters
Batch sign engagement letters in seconds
Engagement letters turn client onboarding into a signature queue: same firm, same signature block, new client details. PDFBatchSigner does the repeat work in one pass.
No account. No subscription. No server.
Live demo — Add documents to see each file auto-matched to a template, then sign the batch. Nothing leaves this page.
The specific problem
Engagement Letters usually means engagement letter, client authorization, scope letter, retainer letter, and firm signature. The names change. The signature work does not.
That is why this page exists for sign multiple engagement letters, not for generic PDF signing. This is for the stack, the repeat fields, and the moment where one-by-one signing stops making sense.
How it works for engagement letters
01
Template the repeat spot.
Mark firm signature blocks across client letters on a sample PDF. Keep the template for the next batch.
02
Drop the stack.
Add the folder of PDFs. PDFBatchSigner looks for the same form structure and places the signature where it belongs.
03
Review, then seal.
Useful for firms that prepare many client PDFs and need a verifiable signed file. One look, one click, tamper-evident output in the folder you choose.
Real signatures, not just pictures of one.
Shows in any reader.
This is a verifiable PDF signature built into the file, not an image pasted on a page.
Really you.
Use the Secure Enclave-protected device key by default, or import your own .p12 certificate.
Two ways to sign, your choice.
Default
Secure Enclave key
PDFBatchSigner signs with a secure key generated on your device and protected by Apple's Secure Enclave. Nothing to buy, nothing to set up, fully offline.
Advanced
Bring your own .p12
Already have a signing certificate from a trusted authority? Import your .p12 and your signatures carry your verified identity, recognized in Adobe Acrobat and beyond.
Engagement letter fields to verify
- Client name
- Scope of work
- Fee schedule reference
- Firm signature block
- Client acknowledgment page
FAQ
Can I batch sign engagement letters on iPad?
Yes. PDFBatchSigner works on Mac, iPhone, and iPad, with templates and signatures synced through your own iCloud.
Are these real PDF signatures?
Yes. Each signed PDF is cryptographically sealed. If the file changes afterward, the signature breaks and PDF readers can show that the document was altered.
Do my engagement letters leave my device?
No files go to a PDFBatchSigner server. Signing happens on your device; templates and signatures sync through your own iCloud.
Can I use my own signing certificate?
Yes. The default key is generated on your device and protected by Apple's Secure Enclave. If you already have a trusted signing certificate, import your .p12 for a certificate-backed identity.
Can I keep partner signatures separate?
Yes. Store each partner signature and choose the signer for the batch.
Drop the stack, done.
Join the private beta and be first to batch-sign engagement letters on Mac, iPad, and iPhone.
✓
You're on the list. We'll email your invite when your beta slot opens.
First 200 signatures free. Then $19. Once.