记忆卡片

The customer returns a pair of wireless headphones because the battery fails and power cuts out after a few minutes of listening. Instead of a paper slip, the customer presents a digital receipt in an email on a smartphone, which the shop assistant accepts as valid proof of purchase. Although the assistant initially proposes a payment refund, the customer requests an exchange to receive another pair of working headphones for an upcoming trip, and the assistant agrees.

These headphones are faulty because they switch off after two minutes.