How to Handle E-Invoice Rejections and Cancellations in Malaysia 2026

Two distinct actions can reverse an e-invoice in MyInvois — rejection and cancellation — and understanding the difference is critical because they have different initiators, timeframes, and implications.

Cancellation is initiated by the supplier (the party that issued the invoice). A supplier can cancel an invoice within 72 hours of validation if they discover an error — wrong buyer details, incorrect amounts, duplicate submission, or an invoice issued to the wrong party. The cancellation request is submitted to MyInvois via the supplier's software or the portal. Once cancelled, the invoice is marked as void and can no longer be used as a tax document.

Rejection is initiated by the buyer (the party that received the invoice). If a buyer believes the invoice is incorrect — wrong goods, wrong prices, or not related to a real transaction — they have 72 hours from the validation timestamp to reject it. Once rejected, the invoice is removed from the buyer's tax records. Importantly, a rejected invoice does not automatically disappear from the supplier's records — the supplier must then decide whether to cancel the original and reissue, or investigate the dispute.

After 72 hours, neither party can cancel or reject the invoice through MyInvois directly. At this point, the invoice is locked as a permanent tax record. Corrections can only be made by issuing a credit note (to reduce the amount) or a debit note (to increase it), both of which must themselves be submitted to MyInvois as new validated documents.

The 72-hour clock starts ticking from the moment MyInvois timestamps the validated invoice — not from when you sent it to the buyer. In practice, this means your review window is shorter than you might assume if there are delays in delivery.

For businesses with high invoice volumes, manually tracking which invoices are within their 72-hour window is impractical. Software that supports real-time status monitoring — showing invoice age, validation timestamp, and current status — is essential for compliance at scale.

Internal process recommendations: Implement a same-day invoice review step where your accounts team checks newly validated invoices within 24 hours of submission. Set up automated alerts in your accounting software when an invoice approaches its 72-hour mark. Establish a clear escalation path for disputes — particularly for high-value B2B invoices where a buyer might request an amendment.

For businesses that work with buyers who are slow to review invoices, it is worth proactively sending the validated e-invoice immediately after MyInvois returns the UUID, with a note requesting confirmation or flagging of any discrepancies promptly. Some businesses include the 72-hour window in their standard invoice communication templates.

Note: LHDN has not announced any exceptions to the 72-hour rule. System outages on LHDN's end that prevent cancellations within the window should be reported immediately to LHDN support with evidence of the attempted action.

Once the 72-hour cancellation or rejection window has closed, the only way to correct a validated e-invoice is to issue a linked credit note (to reduce) or debit note (to increase the amount).

A credit note is the most common correction document. It links to the original invoice UUID and reduces the taxable value. Common use cases: the buyer returned goods (partial or full return), an overcharge was discovered after the window closed, a discount was agreed post-invoice, or a service was not delivered as invoiced.

A debit note increases the value of the original invoice. This is used when additional charges apply beyond what the original invoice stated — for example, if freight costs were underestimated or an additional service was performed after the original invoice was raised.

Both credit and debit notes must be submitted to MyInvois and validated just like regular invoices. They receive their own UUID and are permanently linked to the original invoice UUID. LHDN uses these links to maintain a correct tax trail — the net amount across the original invoice and its associated credit/debit notes represents the actual transaction value for tax purposes.

Your accounting software should automate the generation of credit and debit notes with the correct reference to the original invoice UUID. Manually entering these links is error-prone. If your software does not support automatic linked credit notes, raise this with your vendor — it is a core feature of any compliant e-invoicing integration.

When a buyer rejects your e-invoice, follow this structured response:

Step 1 — Investigate the rejection: Contact the buyer to understand the specific reason for rejection. Was it incorrect pricing, wrong item description, or a clerical error? Document the reason in your internal system.

Step 2 — Assess the timeline: Check whether the original invoice is still within its 72-hour cancellation window. If yes, cancel it directly in MyInvois and reissue with corrections. If the window has passed, you'll need to issue a credit note and potentially a new invoice.

Step 3 — Cancel and reissue (within 72 hours): In your accounting software, navigate to the invoice, select cancel, and provide the cancellation reason. Issue a corrected invoice to the buyer. The new invoice gets a new UUID.

Step 4 — Issue credit note (after 72 hours): Generate a credit note linked to the original invoice UUID for the full amount (or partial amount if only part is disputed). Submit to MyInvois. Issue a new invoice for the correct amount if a replacement is needed.

Step 5 — Update buyer's records: Notify the buyer of the credit note UUID and the new invoice UUID (if reissued). They must reference these in their accounting records.

Step 6 — Internal reconciliation: Update your accounts receivable to reflect the cancellation, credit note, and new invoice. Ensure your SST records are updated to reflect the corrected taxable amounts.