Issue with blockchain deterministic wallet and in particular BIP44 20 unpaid address gap issue. Here is recommendations from block chain support: {{{ Hi, Generally, there should not be more than 20 unpaid addresses when working with this API. This is because this API leverages BIP 44 (as defined here: https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki ). I've created a google doc to help you recover the funds used. You should switch to a new account for this API, and please try to remain under the 20 address gap: https://docs.google.com/document/d/1-2l6xOqcbjs9QWEqSh72RD1d8EEdvG_hQuEXw_f_o6w/edit?usp=sharing The address indexes you need to recover are: [251] 125fPxLHcEuGZ2wx6gW8dZzMsjuZ2cgW5P balance= 100000 [252] 15nb3LBkzzxwDTXmWXv2nJJuZVNR9ZJFrd balance= 100000 Best, Kevin }}}