MyInvois e-invoicing integration, done to the letter of the standard
Causal Labs implements Malaysian e-invoicing (MyInvois/LHDN) compliance — UBL 2.1 document structure, XAdES digital signatures, PKI credential handling — alongside broader RegTech and market-surveillance tooling. Past delivery includes MyInvois e-invoicing implementation and regulatory surveillance tooling built for sandbox compliance programmes, over 8–14 week engagements.
Causal Labs implements Malaysian e-invoicing (MyInvois/LHDN) compliance — UBL 2.1 document structure, XAdES digital signatures, PKI credential handling — alongside broader RegTech and market-surveillance tooling. Past delivery includes MyInvois e-invoicing implementation and regulatory surveillance tooling built for sandbox compliance programmes, over 8–14 week engagements.
Why e-invoicing compliance is a systems problem, not a forms problem
MyInvois isn't a form you fill in — it's a structured document standard (UBL 2.1) that has to be digitally signed with XAdES, transmitted through LHDN's API in the correct sequence, and validated against schemas that reject malformed submissions outright. A business's existing invoicing system almost never produces this format natively.
The real work is the integration layer: generating spec-correct UBL 2.1 XML from whatever your current invoicing or ERP system produces, managing the PKI credentials and digital signature lifecycle correctly, and handling the submission-and-validation loop with LHDN's sandbox and production environments without manual intervention on every invoice.
Get any of that wrong and invoices get rejected, or worse, silently fail compliance in a way that only surfaces during an audit. We build this integration once, correctly, tested against the actual validation rules — not against a simplified interpretation of them.
How we implement MyInvois / LHDN e-invoicing compliance
Requirements gathering
We review your current invoicing/ERP system's data model against the MyInvois UBL 2.1 schema to identify every field-mapping gap upfront.
Scoping & proposal
We scope exactly which invoice types and volumes need to be supported, and the credential/signing infrastructure required.
Design
Field mapping from your existing system to UBL 2.1, plus the PKI and XAdES signing architecture — key storage, rotation, and audit trail.
Build
Automated UBL 2.1 generation, XAdES signing, and the LHDN submission/validation integration, tested against the sandbox environment first.
QA & review
We test against real invoice edge cases — credit notes, cancellations, consolidated invoices — not just the straightforward standard invoice.
Handover & support
You get the integration, documented credential-rotation procedures, and a support window through your production cutover.
What's included
UBL 2.1 document generation
Automated, spec-correct UBL 2.1 XML generation from your existing invoicing or ERP data.
XAdES digital signatures
Correctly implemented digital signing with proper certificate handling — not a simplified approximation that fails validation.
PKI credential management
Secure storage, rotation and audit trail for the signing credentials the integration depends on.
LHDN API integration
Submission and validation handling against both sandbox and production MyInvois environments.
Edge-case coverage
Credit notes, cancellations, consolidated invoices and self-billed invoices — not just the standard invoice path.
Audit logging
Every submission, validation result and signature event logged for compliance review.
- Production MyInvois/LHDN integration
- UBL 2.1 field mapping documentation
- XAdES signing implementation with PKI credential handling
- Sandbox and production validation test suite
- Audit log of submissions and validation results
- Credential rotation runbook
The Malaysian e-invoicing platform and tax authority API the integration submits to.
The structured XML document standard MyInvois requires — generated automatically from your existing invoice data.
The digital signature standard applied to every submitted invoice document.
Underpins the certificate and credential infrastructure the signing process depends on.
Implemented MyInvois e-invoicing (UBL 2.1 + XAdES digital signatures) and regulatory surveillance tooling for sandbox programmes.
implemented to the full MyInvois specification, not a simplified subset
typical delivery window including sandbox validation
Questions about this service
Do you handle the transition from MyInvois sandbox to production?
Yes — the build is tested against LHDN's sandbox first, and the engagement includes the production cutover with a support window either side of it.
What if our current invoicing system doesn't map cleanly to UBL 2.1?
That's the norm, not the exception. Most existing systems are missing fields UBL 2.1 requires — we identify the gaps during requirements gathering and either extend your data capture or apply documented defaults where the standard allows it.
Do you also cover Singapore's InvoiceNow / Peppol requirements?
Our production delivery to date is MyInvois/LHDN for Malaysia. If you need Peppol/InvoiceNow for Singapore, tell us your timeline and volume and we'll scope it honestly — including where the standards overlap.
Who holds the signing credentials once the integration is live?
Your organization does — we build the credential storage, rotation and audit infrastructure, but the credentials themselves remain under your control, consistent with how PKI-based compliance systems should be operated.
Facing a MyInvois compliance deadline and an invoicing system that doesn't speak UBL 2.1?
Tell us what system you're integrating from and your rollout timeline. We'll give you an honest scope.
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