If you are a merchant, never trust a screenshot or a receipt shown on a customer's phone. Always log into your own Nequi app to confirm the balance has actually increased.
To keep your money and data safe, always follow these security guidelines:
Promises that the app allows you to type in any amount of money and have it appear in your balance.
Tools that generate realistic-looking payment confirmations to trick sellers into believing a transfer was made when it wasn't.