Most time because of the lent in the numeric of wallet address most newbies and even old members sometimes make mistakes in wallet address which often time lead to loss of the fund and be aware of the irreversible nature of cryptocurrency transaction to avoid this always make sure you double-check the wallet address properly before clicking send.
It is important to check the address. Once the wrong address is sent, it cannot be retrieved.
I copy and paste again, and then check the address to prevent clipboard malware.
It is very convenient to use the QR code, but I don’t know how to check whether the QR code is correct.