Most FBM sellers think Customer Service by Amazon
By Steven Pope · June 24, 2026 · Curated by George's Blog
Most FBM sellers think Customer Service by Amazon
is about offloading email duty
It is not
It is about plugging the holes in your P&L
that you stopped noticing
Return-less refunds are not a rounding error
Buyer gets refunded
Buyer keeps the product
Seller eats the cost
Lovely little margin bonfire
Amazon’s CSBA update changes the math
by reducing how often return-less refunds happen
and automatically reimbursing sellers
When a covered delivery issue is the actual culprit
But the bigger advantage is not just reimbursement
It is the data
Most sellers track ACOS
They track TACoS
They track conversion rate
Then Contacts per Unit sits in the corner
like the metric nobody invited to the party
Bad idea
CPU is the percentage of orders
that generate a customer contact
High CPU usually means something
is breaking upstream
Your listing is overpromising
Your packaging is failing
Your defect rate is climbing
Your fulfillment experience is creating friction
Now CSBA gives sellers better customer issue data
to actually see where the machine is breaking
Amazon also moved these alerts
into Buyer-Seller Messages
Your customer issue trail
is not scattered across inbox chaos
That means CSBA is not just customer service
It is a free diagnostic report
with a refund shield attached
When contacts spike on a specific SKU
Pull the listing copy
Images
Recent reviews
Packaging complaints
Delivery issue data
Find the gap between what the buyer expected
and what showed up at the door
Fix that gap and you lower contacts
Protect margin
Keep CPU below 3%
Which Amazon says is the threshold for CSBA to stay free
The reimbursement piece is reactive
The customer issue data is proactive
Sellers who only chase reimbursements
play defense forever
Sellers who use the data
to fix listings
Packaging
Fulfillment
Stop generating the problems in the first place
One feature
Two completely different outcomes
depending on how you use it