Client PII is the whole risk
A single engagement letter is low-risk. A folder of 8879s full of Social Security numbers is not. Uploading those to a free web tool is precisely the kind of exposure a practice should avoid on principle.
For accountants, bookkeepers and advisors
Electronic signatures for accountants and financial advisors
Accounting practices handle some of the most sensitive material there is: tax returns, Social Security numbers, bank details, payroll records. That raises a question most signature tools never address — what happens to the document after you hand it over?
The honest answer for a cloud e-signature service is that it is stored on their infrastructure, usually for as long as your account exists, governed by their retention policy and their security posture. For a client's tax return, that is a decision worth making deliberately rather than by default.
Signing 8879 authorisations, engagement letters and advisory agreements in the browser means the file stays in the browser. We never receive the return, the SSN, or anything else in it — because there is no server in the path to receive it.
Where the friction is
What actually slows signing down in an accounting practice
Seasonal peaks, year-round subscriptions
Filing season brings a surge in signatures, then it stops. Monthly per-seat pricing is a poor fit for a workload that is concentrated into a few weeks.
Institutional paperwork has its own channel
Custodians, lenders and investment platforms push their own signing workflows. A subscription just for your own counterpart signatures rarely pays for itself.
What you sign
Typical documents
- Client engagement and disengagement letters
- Form 8879 e-file authorisations
- Tax organiser acknowledgements
- Financial planning and advisory agreements
- Bookkeeping and payroll service agreements
- Year-end representation letters
- Internal review and sign-off checklists
Clear limits
When a signature is not enough
- Documents required by a platform you do not control — custodian forms, lender packages and some investment applications must go through the institution's own system.
- Anything requiring notarisation, such as certain powers of attorney and some account authorisations.
- Filings with agencies that impose their own signature or transmission requirements, which can be stricter than ESIGN.
- Client records you are required to keep in a specific system of record — an e-signature creates the mark, it does not create your retention system.
Electronic signatures and the IRS
The IRS permits electronic signatures on a number of tax forms, including Form 8879, when the electronic signature process meets its requirements. Where a particular form or filing is not covered, the agency's own instructions govern — that is a separate question from ESIGN, which covers the underlying contract law. The practical rule for a practice is that ESIGN covers your engagement letters and advisory agreements, and each agency's published rules cover its own forms.
How it works
Why nothing leaves your device in an accounting practice
The documents in this field are the ones people are least comfortable handing to an unfamiliar service. Our tools process them entirely in the browser.
- 0
- bytes of your document sent anywhere The PDF is opened, modified and saved in your browser tab. There is no upload step in the process.
- None
- upload endpoint to send to This site is generated as static files. There is no API route and no server process, so there is nothing to receive a document even in principle.
- Nothing
- to log into, delete or unshare No account is created, so no server-side copy accumulates. Closing the tab ends the session.
- Yours
- to keep or destroy at any time You save the signed file where you choose. We never hold it, so there is no retention policy to read.
The technical version
PDF pages are rendered and written in the browser with open-source libraries that run entirely on the client. Signature strokes are captured on a canvas, and saved signatures are kept in your browser's own storage — the same mechanism any website uses to remember a preference. None of these components has a network call that transmits a file, and there is no backend for one to reach.
You do not have to take that on trust. Open your browser's developer tools, switch to the network tab, and sign a document. You will see the page's own assets load — fonts, scripts, stylesheets — and nothing else. No request carries your document, because none is made.
Where this is not the right tool. Browser-based signing is excellent for documents you sign yourself. It does not send a document to other people, collect their signatures, verify their identity, or produce an audit trail. When a counterparty or a compliance policy requires those things, use a platform built for it — the trade-off is real and worth naming rather than glossing over.
Related
Other industries we cover
FAQ
Accountants & financial advisors: common questions
Is it safe to sign a tax document online?
It depends entirely on whether the tool uploads the document. With a browser-based tool the return never leaves your device. With a cloud signing service it is stored on their infrastructure under their retention policy, which is a vendor relationship your practice should evaluate deliberately given what is in a tax return.
Can Form 8879 be signed electronically?
Yes. The IRS accepts electronic signatures on Form 8879 when the electronic signature process meets its requirements, and it has extended electronic signature acceptance to a range of other forms. Because the list and requirements change, confirm against the current IRS guidance for the specific form you are filing.
Do you store my clients' Social Security numbers?
No, and we cannot, because we never receive them. The document is opened, signed and saved in the browser. There is no upload step, no server-side copy and no storage account holding the file.
Are electronically signed engagement letters binding?
Yes. An engagement letter is a contract, and under the ESIGN Act and the state UETA an electronic signature carries the same legal effect as a handwritten one where the signer intended to sign and the record can be retained and reproduced.
What about loan documents and mortgage paperwork?
Those typically require notarisation or go through the lender's own platform. A client-side signature tool is not the right instrument for a deed or a notarised document — use the lender's process for those.
Do I need to keep a copy of what was signed?
Yes. Keeping the executed document is your obligation and good practice regardless of how it was signed. This tool creates the signature; storing the signed file in your practice management system is still your record-keeping step.