One crate received and photographed, with the arm inside; the order and packing list include the controller and adapter, but neither was in its packing.

Our receiving team once found a second package on an adjacent pallet. Worth checking their unloading record, but do not let that replace the seller identifying its claimed separate shipment.

Receiving checked the unloading photographs and bay records; still one crate, so I sent that inventory against the complete-package list and asked the seller to trace the other items.

Does the seller say the controller and adapter share that second package? I'd want that stated, not infer it from the fact that both are missing.

Yes, get each missing item linked to a package. Separate can mean several different things.

They now say both are in one controller crate and have supplied its marking, but the transport reference they sent still resolves to the arm delivery.

Send the controller crate marking to the named carrier contact and ask for its own status. One delivered arm does not make the rest of the order contagious.

Elena's route is sensible once Luis has the contact. I would attach the seller's contents statement too, so the enquiry cannot come back as another confirmation that the arm arrived.

Did the carrier actually receive that controller crate, Luis? A marking tells you what to trace, but not where it has got to.

The forwarder confirms receipt of the marked controller crate at origin and says it awaits consolidation; no onward booking yet, so installation remains unscheduled and we still haven't received the controller or adapter.