CASE STUDIES

What the
problem
actually was.

Longer write-ups than a project card allows: how a system was scoped, what got built, and what it deliberately does not do. The limits are on the page, not in a footnote.

Haulage and trading

OKAYA Transport & Trading

2026

Getting a haulage book e-invoice ready — before writing a line of submission code

OKAYA runs haulage and trading out of Malaysia. When the last MyInvois band came into force, the interesting problem was not the API. It was that a paper haulage invoice has never carried the fields LHDN now requires, so there was nothing to submit even if a submission client had existed.

Shorter write-ups of everything else are in the project index. What a given sector's records have to hold before any of this is worth building is set out in the sector notes, and the LHDN dates behind the MyInvois work are in the reference guides.

BOOTINGJRV//SYSTEMS/

What theproblemactually was.

Getting a haulage book e-invoice ready — before writing a line of submission code

What theproblemactually was.

Getting a haulage book e-invoice ready — before writing a line of submission code

What the
problem
actually was.

What the
problem
actually was.