Secure document sharing with your accountant — the practical SME guide

· 7 min read · SilverData team

Most SMEs in Poland exchange documents with their external accounting firm in a way that becomes expensive the first time a GDPR audit lands, a phishing attack succeeds or a mailbox breaks. The alternative — proper order between company and accountant — is neither complicated nor costly. It only requires a decision.

This topic comes up in our calls surprisingly often. An owner rings about something else — an e-commerce–ERP integration, say — and along the way it turns out payroll runs get emailed to the accountant from a personal Gmail, and purchase invoices sit in a shared Dropbox folder that nine people can see, including the intern who left in March.

Where the mess comes from

It is rarely anyone's bad faith. Historically you drove a folder to the accountant once a month. Somewhere between 2010 and 2015 the folder was replaced by a scanner and email. Document volumes grew — civil-law contracts, payroll slips, JPK files, holiday requests, reports out of Comarch Optima or Subiekt, bank statements, transfer confirmations, Allegro invoices, expense claims. The handling didn't grow. It's still "attach and send".

Nobody sat down to ask "what mode are we actually exchanging these in". Because it worked. Until it stops.

Three classic bad patterns

What you're really risking

It is not theoretical risk. It's the things that actually happen in Polish SMEs every year:

What actually works

You don't need an expensive DMS or a six-month project. In most SMEs a sensible mix of three channels is enough:

Three channels isn't "complicated" — it's order. One channel per document stream. Invoices via portal or KSeF, HR via SharePoint, everything else via one named place — never via the owner's mailbox.

A concrete case

One of our clients — a 24-person electrical wholesaler in Greater Poland with about PLN 28 million in annual revenue — used to run it like this. Each month roughly 800 purchase invoices went to accounting (scans from reception), 1,200 sales invoices out of Comarch Optima, 24 payroll slips, a dozen civil-law contracts and a few dozen cash reports. Everything through invoices@firm.pl, a shared inbox four people could reach, plus WeTransfer on Friday evenings when the 25 MB attachment limit kicked in.

At the 2025 year-end close, the accountant reported three scans missing. It turned out one invoice had been filtered as spam on their end, a second bounced back because their inbox was full (nobody noticed the bounce), and the third had been sent from the warehouse manager's private account and never arrived. Four days of searching.

We cleaned this up on two tracks. Invoices — the accounting firm's portal (SaldeoSMART, with automatic OCR and cataloguing by counterparty name). Contracts, payroll and statements — a dedicated SharePoint folder, the accountant added as a guest with MFA required, an access log emailed to the owner weekly. The monthly close dropped from about five working days to two. The volume of "please handle this now, I need to send it today" emails went to zero. Three inboxes that only existed for accountant traffic could be closed.

How to implement it step by step

What's next

Sooner or later something will force this change on you: an audit, a phishing attack, a mailbox outage, or the person who "knew where things were" quitting. Better to do it in a calm quarter than under a regulator's deadline.

If you're not sure which stream to tackle first, half an hour with someone who has cleaned this up in a dozen similar organisations will save you a month of going in circles.

Document exchange with your accountant is nobody's conference-stage topic. It's the topic on which a serious company faceplants once a year. Fixing it is cheap if you do it before you fall.

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