AI Voice Agent for NetSuite Return Authorizations (RMA)

NetSuiteAIVoice AgentsRetelln8nReturnsRMA

A return call goes the same way every time. A customer explains what they're sending back, a rep asks for the order number, the item, and the reason, then opens NetSuite and types an RA by hand. Same four fields, every call, all day.

I built an inbound AI voice agent that handles the intake and creates the Return Authorization itself, while the customer is still on the line.

How it works

The customer calls in and the agent picks up talking. It asks for the order number, the item they're returning, and why. Once it has all three, it queries NetSuite mid-call to confirm the order is real and pull the item list, so it isn't just trusting whatever the customer says. It reads the details back for confirmation, then writes the Return Authorization in NetSuite and reads the RA number back before the call ends. After the call, a separate step logs a Phone Call activity to the customer record with a summary of what was discussed.

Every previous agent in this series read from NetSuite: invoice lookups, order status, quotes. This one writes to it. That's a different level of trust to hand to a voice agent, and it changes what has to be verified before anything gets committed.

The part that took the most tuning

NetSuite doesn't always let you create a transaction record the straightforward way. In this build, a bundled compliance SuiteApp added a required custom field to new Return Authorizations, one with no valid value for that transaction type, which meant a plain create call failed every time. The fix: have the agent update a pre-existing RA instead of creating one from scratch. That sidesteps the validation, since it only fires on creation. You only find constraints like this by hitting the wall. "Just call the API" often means working around whatever else is bolted onto the account first.

The stack

  • NetSuite: order and item data, and the transaction the agent writes to (SuiteQL for lookups, REST API for the write)
  • Retell AI: the voice agent, live on the call
  • n8n: orchestration between the call and NetSuite, both mid-call and after

Demo's on LinkedIn.