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Reference Document Number — MyInvois LHDN Explained
Links this e-invoice to a related document such as a Purchase Order, Delivery Order, or contract
Why LHDN requires it
Creates a verifiable audit trail between documents for LHDN and buyer/seller records
How to get your Reference Document Number
From your ERP, sales order system, or manual entry of the buyer's PO number
Common mistakes to avoid
- Not including the buyer's PO number when they provide one
- Using internal reference numbers the buyer cannot match
- Leaving blank when a credit note or debit note references an original invoice
InvoiceLah handles all 55 LHDN fields
We validate Reference Document Number and every other required field so your e-invoices are ready when submission launches.
Start Free →MyInvois submission launching Q2 2026
Related MyInvois fields
- Tax Identification Number (TIN)
- MSIC Code
- Classification Code
- Payment Mode
- Business Registration Number (BRN)
Frequently asked questions
What is the Reference Document Number in MyInvois?
Links this e-invoice to a related document such as a Purchase Order, Delivery Order, or contract
Why does LHDN require the Reference Document Number?
Creates a verifiable audit trail between documents for LHDN and buyer/seller records
How do I get my Reference Document Number?
From your ERP, sales order system, or manual entry of the buyer's PO number
What happens if I get the Reference Document Number wrong?
LHDN may reject the e-invoice submission. Repeated errors can result in fines up to RM 20,000 per non-compliant invoice.
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