Is this possible that a transaction my never get confirmed ?

[imawriter]

I am using blockchain wallet and whenever i want to do the transaction giving lower fee that recommended it says that your transaction may never get confirmed in the blockchain.I wanted to know is this really possible that a transaction remains unconfirmed forever.

[HCP]

The simple answer is Yes, it is theoretically possible.

It is quite possible that a transaction just floats around in the mempool and never gets placed into a transaction because of a fee that is too low. However, this would require that someone keeps rebroadcasting the transaction to the network, as most nodes will drop a transaction if it is not confirmed within around 48-72 hours...

Often, this is done by the wallet of the user that sent the transaction... as some wallets will keep re-broadcasting transactions that have not been confirmed, which will reset the 48-72 hour wait for the transaction to be dropped again. This could theoretically repeat in an endless cycle.

In reality, what usually happens is that the nodes drop the transaction from their mempools, no-one rebroadcasts the transaction and eventually it is like the transaction never occurred and the user is free to spend the bitcoins... or, alternatively, the number of unconfirmed transactions in the mempool gets so small that the miners just include whatever transactions are in the mempool and even ones with super low fees get included in a block...

[gondes21]

So, the higher the fee, the faster it get confirmed?

[absy]

So, the higher the fee, the faster it get confirmed?

Yes correct , the higher fee you give the higher the priority of your transaction to be picked by the miners .

I am using blockchain wallet and whenever i want to do the transaction giving lower fee that recommended it says that your transaction may never get confirmed in the blockchain.I wanted to know is this really possible that a transaction remains unconfirmed forever.

Use the recommended fee , it will go through within 30 minutes max . I sent a transaction with 15k fee by mistake and it took 3 days for confirmation.

[HCP]

So, the higher the fee, the faster it get confirmed?

It is not guaranteed, but in general, miners will tend to prioritise transactions that have a higher satoshi/byte fee... satoshis/byte is the critical thing... NOT the total size of the fee. This is because they only have 1MB of blockspace to work with... so they like to maximise the amount of fees they get for the 1MB.

So if you have two transactions, both have the same data size... but one has a fee that is 200 satoshis/byte and one that is only 50 satoshis/byte, it makes more economic sense for them to include the 200 sat/byte one first.

Likewise, if they have a transaction that is 2000 bytes... and has a fee that is 50 sats/byte (0.001 btc)... and a transaction that is only 200 bytes, but has a 200 sat/byte fee (0.0004 btc)... it still makes more sense for them to prioritise the one that only has a 0.0004 fee, because it has a higher sat/byte fee... and they still have 1800 bytes available and could potentially fit in another 9 transactions.

Remember, there is no rule that says a miner must include any given transaction... you're just trying to increase the odds of your transaction being included by making it as attractive as possible to the miners...

Use the recommended fee , it will go through within 30 minutes max . I sent a transaction with 15k fee by mistake and it took 3 days for confirmation.

Nothing is guaranteed with blockchain transactions... I've seen examples of people paying above the recommended fee and having to wait several hours for things to confirm. I've also sent transactions with 50 sat/byte fee (total was like 10k fee) and it confirmed in like 20 minutes. However, I checked the mempool and sent when there were not a lot of transactions... so I got "lucky"

[basesaw]

It depends on how much transaction fee you input. In my experience 60sats per block takes 1 to 2 hours but I also experienced 50sats per block it takes 3days for me.

[Salmen]

A transaction may never confirms if it has a low fee. The transaction disappears from a few block explorers after some time because they do not recognize it as a transaction if it still unconfirmed. At least after one week you'll be able to spend the bitcoin again since it got purged by the mempool.

If you do not want to spend the bitcoin again and you're in need to confirm this transaction, there are some solutions:

• Look up the hex code using the APIs of Blockexplorer services Chain.so or Blockcypher and broadcast it at Blockr.io or Coinb.in (provide many sources to broadcast).
• Few wallets integrated an transaction accerelator to confirm a transaction with a high fee or use the online tool of ViaBTC: https://www.viabtc.com/tools/txaccelerator/

[boyptc]

I am using blockchain wallet and whenever i want to do the transaction giving lower fee that recommended it says that your transaction may never get confirmed in the blockchain.I wanted to know is this really possible that a transaction remains unconfirmed forever.

Yes it's very possible that it may not be confirmed but the good thing about it, if I'm not mistaken I read it somewhere in the website of blockchain.info because I'm using it that if ever your transaction is not confirmed, your btc will just simply return back to you. But so far, I haven't experience this it's not that bad to follow the recommended fees.

[DevSoft]

Sadly this may happen, and it also had happened to my.

[dearbesz1219]

I am using blockchain wallet and whenever i want to do the transaction giving lower fee that recommended it says that your transaction may never get confirmed in the blockchain.I wanted to know is this really possible that a transaction remains unconfirmed forever.

Yes it is really possible that a transaction may never get confirmed in the blockchain. That's usually happened only if your transaction fee was very low, then if within 48 hours or 72 hours once its not get confirm it will go back to the wallet were it came from. Meaning, we don't have to worry about it because it is still safe and it will never be loss.

[Casy]

It can happen and even without your wallet rebroadcasting the transaction, it may still be a longer time in the mempool. Some clients don't forget the transactions in the mempool that rapidly, I had to experience this as well.

[MicroCode]

Sad bad a true fact. Bitcoin Network lately is very very slow and shit may happen.

[SHAWN-MIDWAYS]

I am using blockchain wallet and whenever i want to do the transaction giving lower fee that recommended it says that your transaction may never get confirmed in the blockchain.I wanted to know is this really possible that a transaction remains unconfirmed forever.

Technicially speaking no ! Depending on the different reasons such as a double spend or low transaction fees a transaction can not be on the ledger forever which shows the transaction did happen and it went through ,if its unconfirmed for a certain period it will have to be dropped and funds returned to address

[Nirvana25]

I think it is never possible

[Shiroslullaby]

What about Child Pays For Parent (CPFP) feature in some wallets?
I had an out-dated version of Electrum and sent a payment last night. Automatic fee was selected but it sent a transaction with 50 Satoshi/ byte fee apparently.
The new version of Electrum has an option to do CPFP to push the original payment. Is this worth doing?

[shield132]

No one has mentioned that text comes from blockchain.info wallet. I can say that if fee is a little lower than normal fee, you are ok but you have to wait much more time and if fee is very, very low, than you have to wait days oe you won't get confirmation and in some days you'll receive bitcoins back. Also if your fee is at least 0.0001 btc, than use viabtc accelerator and keep calm.