In development
How many documents do you exchange per month?
Tell us who you work with — we will connect the exchange on the pilot.
A supplier invoice — straight into your books
Invoices, delivery notes, acts and reconciliation acts with a qualified e-signature. If your counterparty is also in double Hb — the document becomes a draft by itself. If not — they sign it by link, without registration.
MLLLC "Molochar"supplier
Delivery note No. 512
Cream 33% 1 l24 pcs
Butter 82% 0.240 pcs
Mascarpone 0.5 kg6 pcs
Milk 2.5% pet30 pcs
✓ signed · 08:14
HbYour booksrestaurant "Dnipro"
Goods receipt draft
✓Cream 33%24 pcs
✓Butter 82%40 pcs
✓Mascarpone6 pcs
Milk 2.5% — match?30 pcs
Check and postWorks with any counterparty
No need to persuade partners to move to our system.
goods receipt draft · items matched
both in double Hb
The document becomes a draft by itself
Items, prices and VAT are already filled in; the assistant suggests matching new items.
letter with a link · signing without registration
counterparty without the system
They sign by link
A letter with a link: preview, PDF and a file for BAS or 1C, signing with a qualified signature or Diia signature, rejection with a comment.
the document goes to the network the counterparty uses
another exchange service
We send it to their network
If the counterparty works in another exchange service, the document goes there through its API.
a scan or file from a letter
documents sent to you
From a letter — to a draft
A scan, PDF or file from a supplier who is not in the system — the assistant turns it into a document draft.
The counterparty does not need our system
They get a letter with a link and do everything in the browser — view, download, sign or reject.
doublehb.com/d/7Kq…
ACT OF SERVICES No. 88
dated 05.10.2026
Accommodation, 3 nights[X XXX]
Breakfasts[XXX]
Conference room[X XXX]
Total incl. VAT[X XXX]
Contractor ✓ signedCustomer ________
A document was sent to you
LLC "Karpaty Hotel"
Sign with Diia signatureSign with a qualified keyPDFFile for BAS / 1C
Reject with a commentSign in by the code from the letter · no registration · link valid for 14 days
Receive documents from all partners automatically — a free account →
A reconciliation act that reconciles itself
Reconciliation act · September1 difference
DOCUMENTOURSTHEIRS ("MOLOCHAR")
Balance on 01.09[XX XXX][XX XXX]
Delivery note No. 498 · 04.09[X XXX][X XXX]
Payment · 10.09[X XXX][X XXX]
Delivery note No. 505 · 22.09—[X XXX]
Balance on 30.09[XX XXX][X XXX]
If the supplier is also in double Hb, the reconciliation act is compared automatically — line by line. The difference is visible at once: here "Molochar" has invoice No. 505 that you do not have.
- 1Ask for a copy of the invoice — with one button
- 2Get it as a goods receipt draft
- 3Both sides sign the act
You see what happens to the document
Every view, download and signature — in the log.
- 1Sent08:14
- 2Delivered08:14
- 3Viewed09:02
- ✓Signed09:05
receiving
Free
For everyone: double Hb customers and counterparties in the guest account.
sending
A limit in the plan
The monthly number of documents is included in the plan; above the limit — per document.