What happens when this goes wrong?
Every other page shows this payment working. Here you choose what breaks, and follow the damage — because a hold, a return or a missed cut-off is the system working as designed, and reading one calmly is the job.
Pick a failure above. Nothing here is invented — each one is a reason code this rail really uses, at the step where it really strikes.
One Singapore-dollar payment settling gross. Real RTGS operation depends on intraday liquidity management, queue handling, and operating-hour cut-offs across the whole day. Every failure here is authored on A MEPS+ transfer (Singapore RTGS), with the sources that back it.