| 10002 | Blinded message of output already signed | NUT-03, NUT-04, NUT-05 | 
| 10003 | Token could not be verified | NUT-03, NUT-05 | 
| 11001 | Token is already spent | NUT-03, NUT-05 | 
| 11002 | Transaction is not balanced (inputs != outputs) | NUT-02, NUT-03, NUT-05 | 
| 11005 | Unit in request is not supported | NUT-04, NUT-05 | 
| 11006 | Amount outside of limit range | NUT-04, NUT-05 | 
| 11007 | Duplicate inputs provided | NUT-03, NUT-04, NUT-05 | 
| 11008 | Duplicate outputs provided | NUT-03, NUT-04, NUT-05 | 
| 11009 | Inputs/Outputs of multiple units | NUT-03, NUT-04, NUT-05 | 
| 11010 | Inputs and outputs not of same unit | NUT-03, NUT-04, NUT-05 | 
| 11011 | Amountless invoice is not supported | NUT-05 | 
| 11012 | Amount in request does not equal invoice | NUT-05 | 
| 12001 | Keyset is not known | NUT-02, NUT-04 | 
| 12002 | Keyset is inactive, cannot sign messages | NUT-02, NUT-03, NUT-04 | 
| 20001 | Quote request is not paid | NUT-04 | 
| 20002 | Tokens have already been issued for quote | NUT-04 | 
| 20003 | Minting is disabled | NUT-04 | 
| 20004 | Lightning payment failed | NUT-05 | 
| 20005 | Quote is pending | NUT-04, NUT-05 | 
| 20006 | Invoice already paid | NUT-05 | 
| 20007 | Quote is expired | NUT-04, NUT-05 | 
| 20008 | Signature for mint request invalid | NUT-20 | 
| 20009 | Pubkey required for mint quote | NUT-20 | 
| 30001 | Endpoint requires clear auth | NUT-21 | 
| 30002 | Clear authentication failed | NUT-21 | 
| 31001 | Endpoint requires blind auth | NUT-22 | 
| 31002 | Blind authentication failed | NUT-22 | 
| 31003 | Maximum BAT mint amount exceeded | NUT-22 | 
| 31004 | BAT mint rate limit exceeded | NUT-22 |