What Should You Do When a Bitcoin Transaction Is Stuck?

What should you do when a Bitcoin transaction is stuck? There are two common ways to speed it up. The sender can use RBF, resending a transaction with a higher fee rate to replace the original. Either the sender or the recipient can use CPFP, spending an output of the unconfirmed transaction in a high-fee child transaction that pulls the original into a block with it. If you do nothing, the transaction may confirm once fees fall, or it may eventually be dropped by nodes.

Why Do Bitcoin Transactions Get Stuck?

Each Bitcoin block has limited space, and miners prioritize transactions with higher fee rates. Fees are based on transaction size and fee rate, not on the amount being sent, and the more UTXOs a transaction spends, the larger it is. If the fee rate set at sending falls below the market level afterwards, for example because the network gets congested right after broadcast, the transaction sits in the mempool. Another case is spending an output of another unconfirmed transaction: if the first one does not confirm, the second one cannot either.

What Is RBF, and How Do You Use It to Speed Up a Transaction?

RBF (Replace-By-Fee) means the sender resends a transaction using the same inputs and a higher fee rate to replace the original. Businesses should enable RBF when sending so they have room to speed transactions up later.

What Is CPFP, and When Should You Use It?

CPFP (Child-Pays-For-Parent) means spending an output of the stuck transaction in a high-fee child transaction, pulling the parent into a block with it. Recipients can use it too, for example by speeding up stuck deposits as part of fund sweeping.

What Happens If a Stuck Bitcoin Transaction Is Left Alone?

The transaction may confirm on its own once congestion eases, or nodes may drop it from the mempool, but even after being dropped it can still be rebroadcast. So businesses should not send a new, separate payment; they should resend using the same UTXOs to avoid paying twice, and the resend should go through the approval workflow.

Conclusion

When a Bitcoin transaction is stuck, the sender can replace it with a higher fee using RBF, and both the sender and the recipient can use CPFP to get it confirmed. Businesses should enable RBF when sending, resend using the same UTXOs to avoid double payments, and run every resend through approval. Safeheron’s Wallet-as-a-Service provides businesses with MPC key management and a policy engine.

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