Customer bill portal — find old bills with phone OTP

Why customers need access to old bills

The most common reasons a customer asks for a past invoice:

• Warranty claims — manufacturer or service centre needs proof of purchase
• Product returns — your shop's return policy requires the original bill
• GST input tax credit — B2B buyers need a valid tax invoice with GSTIN to claim ITC
• Expense reimbursement — employees need an invoice to submit to accounts
• Personal records — electronics, furniture, jewellery are often re-insured; invoice required

Without a portal, every request lands with your staff.

How the BillRaja customer bill portal works

The customer bill portal at billraja.in/customer is a web page — no app download, no account. The customer:

1. Enters the mobile number they gave at the time of purchase
2. Taps "Send OTP"
3. Enters the one-time password received by SMS
4. Views and downloads all past invoices from your shop as PDFs

The whole process takes under a minute.

How to ensure every customer can use the portal

One action on your side: always enter the customer's mobile number when billing. Best practices:

• Ask at checkout — frame it as "for your digital invoice"
• Double-check the number before saving
• For B2B customers, use the billing contact number so the accounts team can retrieve invoices
• You can still share a specific invoice directly over WhatsApp or email — the portal is the self-serve option

OTP security model

The portal uses Firebase OTP authentication — the same technology used by Indian banking and e-commerce apps:

• Phone ownership proof — only the SIM holder receives the OTP; no password to phish
• Short-lived OTPs — expire in under 5 minutes
• Session expiry — inactivity ends the session; prevents access from a shared unlocked phone
• Read-only access — customers can only view their own bills; no invoice can be modified
• No stored password — nothing to leak in a breach; each session authenticates fresh

Real-world scenarios where the portal saves time

Retail — warranty claim 6 months later

Customer bought a mixer in December; it breaks in June. Instead of calling your shop, they open billraja.in/customer, enter their number, and download the December invoice themselves — no staff involved.

Pharmacy — GST receipts for insurance reimbursement

Patient needs invoices from three separate visits for an insurance claim. They download all three PDFs from the portal in two minutes — zero counter intervention.

Freelancer — client needs an old service invoice

A client needs an older invoice for accounts or reimbursement. Instead of asking the freelancer to resend it, the client logs into the portal and downloads the GST-ready service invoice. It works seamlessly with BillRaja's freelancer workspace.

How to promote the portal to customers

• Add a footer line to every invoice: "View & download your bills anytime at billraja.in/customer"
• A sticker at the billing counter: "Lost your bill? Find it at billraja.in/customer"
• Mention it verbally when handing over a receipt — customers who use it once remember it