How it works
For you
For Traders For Landlords & Agents For Brokers For Jua Kali & Artisans
Partners
For Developers For Financial Institutions
Pricing Verify a document Get started →
How Nana works
Five steps.
One permanent record.
Nana sits inside WhatsApp. No app to install. No platform to learn. The entire process — from creating a document to verifying it — happens in a conversation.
Step 01
Create
Message the Nana number on WhatsApp. Tell Nana what you want to document — an invoice, an agreement, a receipt. Nana asks you the right questions and fills in the document. You review a preview before anything is sent.
What Nana captures
Both parties' names and phone numbers, the items or services, amounts, dates, and any special terms. Everything needed to make the document self-contained and verifiable.
Nana
online
NANAHello! I want to send an invoice.
Sure. Who are you billing?
James Mwangi, 0722 987 654
What are you selling him, and at what price?
Step 02
Send
After you confirm the preview, Nana sends the document link to your counterparty's WhatsApp number. They receive a message with a summary of the document and a link to view it in full on the web.
Document sent to James
Nana
Grace Omondi has sent you an invoice for KES 22,550.

View the document and confirm if you agree.

app.asknana.co.ke/doc/NANA-2026-0048
Step 03
Confirm
The counterparty reviews the document on the web or in WhatsApp. If they agree, they reply with a confirmation and Nana sends them a one-time PIN. They submit the PIN to confirm their identity and their agreement.
Important
The PIN is confirmation of identity and agreement. By submitting it, the counterparty confirms they have read the document and agree to its contents as written. This step cannot be undone.
OTP entry
4
8
2
—
—
—
Enter the 6-digit code sent to your WhatsApp
Step 04
Lock
The moment both parties confirm, Nana generates a SHA-256 cryptographic hash of the document and seals it. The hash is stored and made public. The document is now immutable — Nana itself cannot alter it.
Lock method
SHA-256
Edits possible after lock
Zero
Document Locked
SHA-256: a3f8c2d1e9b4f7c2d8a1e5b3f7c9d2e4…
Step 05
Verify
Every locked document has a QR code and a permanent verification URL. Anyone can scan it — a bank, a supplier, an authority, a suspicious counterparty. The verification page shows exactly who agreed, what was agreed, when it was locked, and proves the hash matches.
verify.asknana.co.ke/NANA-2026-0048
Document Verified
Locked · Tamper-proof · SHA-256 confirmed
TypeTrade Invoice
SellerGrace Omondi
AmountKES 22,550
Locked14 May 2026 · 10:32 EAT
Questions
Frequently asked.
Do both parties need a Nana account?▾
No. The person who creates the document needs a Nana account. The counterparty only needs to receive a WhatsApp message and enter a PIN. They can confirm documents without registering. After confirming, they are offered the option to register their own account — but it is not required.
What if the counterparty refuses to confirm?▾
The document stays in pending state. After 48 hours it expires. The creator receives a notification and can choose to resend, edit and resend, or cancel the document. A counterparty who refuses to confirm tells you something important about the deal — before money has moved.
Can a locked document be edited or deleted?▾
No. Once a document is locked, it cannot be altered by either party or by Nana. The SHA-256 hash makes any change detectable. If the contents of a locked document are in dispute, both parties can file a dispute through Nana — but the document itself remains unchanged.
Is a Nana document legally binding?▾
Nana documents are not contracts in the strict legal sense — they are verified records of agreement. A locked Nana document is strong evidence of what was agreed, confirmed by both parties using OTP, timestamped and sealed. In a dispute before an arbiter or small claims court, it is far more credible than a screenshot or a verbal account.
What document types does Nana support?▾
Seven core types: Invoice, Trade Agreement, Receipt, Quotation, Delivery Note, Tenancy Agreement, and Instalment Agreement. Industry-specific templates are available for traders, landlords, brokers, artisans, and more — depending on your plan tier.
Does Nana work without internet?▾
Nana requires a WhatsApp connection to create and confirm documents. Once a document is locked, the verification URL and QR code are public and can be accessed by anyone with internet access — including the counterparty scanning the QR code to verify a physical document.
NANA
Ready to try?
Start your first document in under two minutes. Free.
Start on WhatsApp →