Hy to everyone, Just some days ago I send for error some BCH to my BTC Wallet. I use ELECTRUM. I realized after that I made a mistake with the address and I tried to recover, I import my private key in the electrum cash wallet but nothing, I tried also to import the seed nothing again. I check and I realized also that my private key not correspond to my address. My address start with the number 3 and I discovered that is a multi-sign address. I don't understand how I am using a multisig address when I didn't choose that, but anyway my problem persist and someone could help to find a way to have back my BCH? How can I export the correct key of my address I don't know what I can try anymore.
Addresses starting with "3" do not always correspond to a multisig address. Such addresses are called P2SH (Pay-to-Script-Hash) addresses. In order to get your bitcoins back from such addresses you need to know the script corresponding to the address and provide the right arguments. In most cases this is indeed a MultiSig address. But with electrum it is more likely that this is a P2SH-P2WPKH (Segwit) address, if you used a BIP39 mnemonic seed and the Derivation Path m/49'/0'/0' . In that case you only need your public key hash to claim your BCHs back. If i understand correctly you only need to provide
as script signature in your transaction to fullfill the requirements in a non segwit environment.