Depends on the wallet, different wallets have different processes to double spend (or don't allow you to). Double spending basically replaces a transaction that you have already made, by spending the same input multiple times (hence the term 'double spending'). Only one can get confirmed, so the others stay unconfirmed forever.
Let me know the txid and the wallet you use, and I can help you double spend with a higher fee so that it's confirmed.
So basically sending transaction out with low fees and after that sending it with higher fees with the same amount? Double spending is used by Scammers right? So how double spending does the scam? Normally sent out BTC doesn't allow you to cancel the transaction right?
I used BlockChain wallet to send out.
The txiid is there
https://blockchain.info/tx/72c4eadfe654f79307936ec0a2de74c87e5e92414120227d3ce8e15962556ee6I doubt that double spending sees much use by scammers nowadays, as it will only work with people who don't have a basic understanding of the bitcoin network/blockchain -- To them it might look like the transaction is incoming, while it actually is never going to confirm.
It is much more often used by people performing RBF - Replace-By-Fee, -- rebroadcasting their transaction with a higher fee, as Darkstar already stated.
Normally sent out BTC doesn't allow you to cancel the transaction right?
No, but it doesn't prevent you from sending out these coins again with a higher fee to another adress, thus making them confirm faster while it looks like they're going to be received by another adress.
(Atleast that is the case with most wallets, eg electrum.)