Loss prevention at a point of sale (‘POS’) with POS apparatus including a microphone, a speech to text converter, a POS transaction module, a POS transaction log, and a POS security module, also including storing, by the POS transaction module in the transaction log for commercial transactions at the POS, information describing each transaction, including capturing for each transaction, into the transaction log through the microphone and the speech to text converter as text, speech utterances of transaction participants; identifying by the POS security module a risk of loss in dependence upon the information stored in the transaction log including the captured speech utterances; and notifying by the POS security module the store manager of the identified risk of loss.