Banking transfer scam app.
The app creates an image confirming a successful payment for the correct value. This is fake and no money will have been sent.
The app is being used on popular auction and marketplace websites.
Take steps to protect yourself by making sure you receive payment confirmation from your online banking account or ask your bank before posting any goods.
You could also take a photo of items before posting them so you have proof of condition in case of a fraudulent claim.