Quick answerA warranty claim or physical replacement decision carries logistics and fraud risk that a refund decision does not, since approving one commits inventory, shipping cost, and often a second physical unit that cannot simply be reversed the way a payment can. Let an AI agent approve replacements autonomously only within a defined product-and-value band, only when it can verify the claim against objective signals such as purchase records and prior claim history, and only with velocity limits per customer and per product batch, since physical-goods fraud tends to cluster in ways a single-transaction threshold will not catch.
Why goods are a different risk shape than money
A separate post in this series covers no-human-review refund thresholds, set by comparing the cost of universal human review against expected fraud loss on a dollar basis. A warranty or replacement decision does not reduce cleanly to a dollar threshold in the same way, because approving one sets a chain of physical events in motion, inventory gets allocated, a unit ships, a return may or may not come back, that a monetary refund never triggers. A refund that turns out to be fraudulent costs you the money. A replacement that turns out to be fraudulent costs you the unit, the shipping, and often the original unit that was never actually defective and never gets returned.
What makes a claim verifiable enough to automate
Autonomous approval works best when the agent can check the claim against objective, hard-to-fake signals: a purchase record tying the claim to an actual sale, a serial number or registration that has not already been used in a prior claim, and a stated failure mode that is plausible for that specific product rather than a generic complaint. A claim that fails any of these checks should route to a human, not because the customer is necessarily wrong, but because the agent has no reliable signal to resolve the ambiguity on its own.
Set the autonomous band by product and value together, not value alone
A monetary-only threshold, the way you might set one for refunds, misses that a fifty-dollar accessory and a fifty-dollar component of an expensive device are not the same risk. Bound autonomous approval by product category as well as value: low-cost, high-volume, easily-restocked items are reasonable candidates for full autonomy at higher claim volumes, while higher-value or supply-constrained items warrant a lower autonomous ceiling even if the dollar value looks similar on paper.
Velocity limits matter more here than for refunds
Physical-goods fraud often shows up as a pattern across many claims rather than one large one: the same customer claiming multiple units over time, or a batch of claims against the same product run that suggests a manufacturing issue is being exploited rather than reported. Track claim velocity per customer and per product batch, not just per individual claim, since a per-transaction threshold that looks conservative in isolation can still let a slow-drip pattern through undetected.
Build a return-verification step into the process, not just the approval
Where the replacement program expects the defective unit back, autonomous approval should not be the end of the automated process. Track whether the returned unit actually arrives and matches what was claimed, and treat a pattern of approved claims where the return never materializes as a signal to tighten that customer's or that product's autonomous eligibility, not just a shipping-logistics footnote.
FAQ
Should the same autonomy threshold apply across all product lines?
No. Set the threshold per product category based on value, fraud history, and how easily a false claim can be verified, rather than applying one company-wide number.
What happens when the agent cannot verify a claim confidently?
Route it to a human rather than defaulting to either automatic approval or automatic denial. An unverifiable claim is exactly the case autonomous handling is not built for.
Does requiring a return of the defective unit slow down the customer experience?
It can, but the tradeoff is often worth it for higher-value items specifically because it is one of the few verification signals available after the fact; lower-value items may not be worth the friction of requiring a return at all.