The first read belongs to you
A set arrives and the natural move is to forward it straight on. Do the opposite for ten minutes. Put the Malay beside the English and walk down the fields one at a time: surname, given names, dates, reference numbers, issuing office. An error that survives as far as a reviewer costs a week; the same error caught on the day costs an afternoon.
What counts as an error, and what does not
A wrong digit, a dropped line, a missing sheet or a seal left undescribed are errors, and they get fixed. A spelling that differs from your passport but matches the certificate is not an error at all — it is the record being reported faithfully. Knowing which is which saves an argument, because those two problems are put right in completely different places.
How a fix actually works
Corrections are never made by hand on the returned page. The set is edited, re-signed and re-dated as a whole, and the new version replaces the old one outright. That is why it helps to report a problem with a page number and the exact words, rather than a general sense that something looks off. One precise note becomes one edit and one new date.
The rate, and the days
The price is £25 for each side of paper as issued, so the bill is predictable before any work starts. Standard turnaround is 3–5 business days from a clean scan, and express work lands inside 48 hours. A reissued set following a genuine correction does not send the clock back to zero, though a batch of pages sent later does begin a run of its own.