Cha-ChingBlog
Notes from running cash on delivery.
Written for somebody who already does this. Nothing here is a listicle and nothing here is about us.
Operations · 2 September 2026 · 5 min read
Your refusal rate is not your return rate
Two numbers that most cash-on-delivery sellers report as one, and the different fix each of them points at.
Operations · 14 August 2026 · 4 min read
The first hour is most of the job
Why the order queue sorts by how long something has been waiting, and not by order number.
Measurement · 30 July 2026 · 3 min read
A rate with no denominator is not zero
The smallest decision in the product, and the one most likely to get somebody penalised for work they never had.
Engineering · 11 July 2026 · 4 min read
Duplicate webhooks are not hypothetical
A production incident that created three finance records inside one second, and the only fix that actually holds.
Operations · 19 June 2026 · 3 min read
The stage between “yes” and “shipped”
Saisie — data entry — is a real job, and the systems that pretend it is not lose a day in the gap.
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