I always check first 3-5 chars, some 3-5 chars somewhere in the middle and 2-3 at the end. I've got this habit since Bitsler website taught me to many years ago and it kept me safe.



Indeed, the double check is very important. And it's not because one will get transaction error - that would mean that the transaction was not sent -, instead it's because one may send money to address different from what's intended (for example because of clipboard malware).

Also double check would mean that one checks that the recipient address is for the same currency as intended.


One more thing I'd advise the newbies is to play around a little with the wallet of their choice before using it with real money. Electrum for example (if you use it, please download from electrum.org and verify it!) can be used also on testnet blockchain, with testnet coins. One can get some small amount of testnet coins from faucet and play around with electrum. This way he can learn about change addresses, fee, and all the steps needed for a proper transaction.