E-Signature Software for CA, CS & Tax Firms — Engagement Letters Signed in Minutes
Stop chasing printed, signed, scanned copies. PracticeStacks lets clients accept and sign engagement letters and proposals digitally with OTP verification — every signature captured with a tamper-proof audit trail your firm can rely on.
Updated July 2026
The Problem — Why Firms Struggle with E-Signatures
The Solution — PracticeStacks E-Signatures
Purpose-built for CA, CS & Tax firms in India.
OTP-Verified Signing
Clients confirm their identity with a one-time password before signing, so you know the right person accepted — not just anyone with the link.
Tamper-Proof Audit Trail
Every signature records the timestamp, IP address, and viewing history. If terms are ever questioned, you have a complete, defensible record.
Sign on Any Device
Clients accept and sign from a phone or laptop in their browser — no app, no printer, no scanner. Most engagements close the same day.
Built Into Proposals
E-signatures are part of the proposal flow. Send a branded proposal, the client reviews and signs, and onboarding triggers automatically.
Automatic Reminders
Unsigned engagement letters get gentle WhatsApp and email nudges until the client signs — no manual chasing from your team.
Signed Copy for Both Sides
Once signed, both firm and client get a stored, accessible copy. No more hunting through inboxes for the final executed document.
How It Works
Send for Signature
Share the proposal or engagement letter via WhatsApp or email. The client opens it in their browser — nothing to download.
Verify & Sign
The client confirms identity via OTP and signs digitally. The timestamp, IP, and view history are captured automatically.
Stored & Onboarding Begins
The signed copy is stored for both sides and onboarding kicks off — document and credential collection starts immediately.
FAQs about E-Signatures
Are e-signatures legally valid in India?
Yes. Electronic signatures are recognized under the Information Technology Act, 2000. PracticeStacks captures OTP verification, timestamp, and IP for each signature, giving you a defensible audit trail for engagement letters and proposals.
How is the signer's identity verified?
The client confirms a one-time password (OTP) sent to them before signing, so you have evidence the intended client accepted — not an anonymous link visitor.
What's in the audit trail?
Each signature records who signed, the date and time, the IP address, and the document viewing history. If terms are ever disputed, you have a complete record.
Do clients need to install anything?
No. Clients sign in their browser on any device. There's no app, no printing, and no scanning — most engagement letters get signed the same day.
Success Stories
Trusted by Reputed Firms
Early firms are already running proposals, compliance and billing on PracticeStacks with precision and speed.
"We used to spend more than an hour on each proposal. Now it takes 10 minutes. The templates are professional and our clients have noticed the difference."
CA Mohseen Shaikh
Partner, A N Gawade & Co LLP
"The compliance tracking alone is worth the subscription. No more Excel sheets, no more missed deadlines. It's transformed how we manage our practice."
CS Yunus Shaikh
Company Secretary, Corporate Compliance
"Finally, a tool built by people who understand our profession. The professional engagement letters give us confidence in every client relationship."
CA Vishal Agrawal
Chartered Accountant, Agrawal & Associates
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