Self-billed debit note — the buyer issues a debit to add to a supplier's self-billed amount.
Type 13 is the self-billed mirror of a debit note. The buyer (who issued the original self-billed invoice) issues a debit note to themselves, increasing what's owed to the supplier. Useful when the original self-billed amount was too low — late-arriving line items, FX adjustments, or contract clauses that trigger after the fact.
Four common scenarios.
- 01Tax agent adding fees to a previously-self-billed client invoice (e.g. late submission penalty).
- 02Procurement team paying a supplier more for additional work beyond the original self-billed scope.
- 03Logistics buyer adding accessorial charges (detention, demurrage) to a metered-service self-bill.
- 04Co-operative settling a member's higher-than-estimated patronage dividend.
What this document type carries that a generic invoice doesn't.
- Original self-billed invoice reference — UUID of the parent type-11 document.
- Party-flip preserved — buyer is the issuer, supplier receives the additional credit.
- Supplier MSIC code required.
- Reason code from LHDN's structured list, positive-sign amounts.
Same pipeline as every other type.
Identical pipeline to type 12, with the sign convention flipped (additive rather than reducing). The bridge's CSV parser accepts the self-billed-debit subset; the dashboard's manual entry surfaces the same dropdown for reason codes; the audit log entry stamps both the buyer (issuer) and the supplier (affected party).
Last updated · May 2026
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