How many confirmations do I need to ensure a transaction is successful? CH - Stronghold Happiness Team January 10, 2018 22:45 Updated Follow Bitcoin transactions require 3 confirmations. Ethereum transactions require 30 confirmations. Related articles Does my transaction require a memo ID? What are Stronghold's Fees? What can I do to make my Stronghold account more secure? How do I add a memo to my Lumens (XLM) withdrawal? Where is my private key? Comments 0 comments Article is closed for comments.