Ledger Nano S Plus (S+) 24-Words Typo & Seed Phrase Wrong Word
An "Invalid recovery phrase" message on the Ledger Nano S Plus indicates an autocomplete prefix error or an 8-bit SHA-256 checksum mismatch. Because the Nano S+ display allows viewing longer word previews, users frequently confirm a word before verifying the full 4-character prefix against their backup card. Each word represents an 11-bit integer. If one word is mistyped, the mathematical checksum on word #24 fails. Verify word spelling against the 2,048-entry wordlist.
# Root Cause & Technical Architecture
The Ledger Nano S Plus features an embedded ST33K1M5 Secure Element running BOLOS with a 128x64 pixel monochrome screen. During phrase restoration, the OS queries an indexed 2,048-word dictionary table. After 3 letters are entered, the interface suggests the first alphabetical match. If a user double-clicks the buttons without cycling to the exact word on their card (e.g. accepting "abandon" when intending "ability"), the 11-bit integer value changes, corrupting the 256-bit entropy block.
# 4-Step Actionable Diagnostic Protocol
Step-by-Step ResolutionCross-Check First 4 Letters Against BIP-39 Index
Every BIP-39 word has a unique 4-letter prefix. For words with only 3 letters (e.g. "act", "cat", "dog"), the word is complete. Confirm that each word on your paper sheet matches the standard list.
Verify Word Number Alignment on Screen
The Nano S+ prompts with "Word #1", "Word #2", etc. Ensure your written backup card is followed sequentially. Entering word 5 into the word 6 prompt desynchronizes the entire entropy array.
Use Air-Gapped Checksum Calculation
If 23 words are verified and word 24 produces an invalid checksum, compute the 8 valid candidates using a local air-gapped tool to identify whether word 24 suffered a spelling distortion.
Deploy Recovery Check App on Device
If the Nano S Plus is currently initialized and operational, install Recovery Check via Ledger Live to validate the paper backup without wiping the device configuration.
# Diagnostic Verification Code / Command
bash# Verify word prefixes against standard English BIP-39 wordlist
# Input: Word to verify
WORD="ability"
PREFIX=${WORD:0:4}
grep -i "^$PREFIX" bip39-english.txt | head -n 5
# Output shows all valid candidates sharing the 4-char root:
# ability (Index: 0002)
# able (Index: 0003)Launch BIP-39 Checksum Solver
Execute client-side cryptographic simulation and parameter checks safely in your browser via native WebCrypto without sending private keys or mnemonics over the wire.
Read Full Investigation & Recovery Workflow
Explore complete architectural diagrams, edge-case failure trees, and detailed post-mortem analysis in our verified deep guide.
# Related Diagnostic Codes in Hardware & BIP-39
Related Hex StatusesLedger Stax 24-Words Invalid, Seed Phrase Typo & Wrong Word
Fix Ledger Stax 24-words invalid error and seed phrase typos. Resolve E-Ink capacitive touch entry slips, SHA-256 checksum failure, and Recovery Check.
Ledger Nano X 24-Words Invalid, Seed Phrase Wrong Word & Typo
Fix Ledger Nano X 24-words invalid and wrong word errors. Troubleshoot dual-button debounce skips, BIP-39 stem swaps, and Recovery Check validation.
Ledger Nano S 24-Words Typo, Wrong Word & Invalid Recovery Phrase
Resolve Ledger Nano S 24-words typo and invalid recovery phrase errors. Fix legacy 320KB flash constraints for Recovery Check and word-order swaps.
# Frequently Asked Questions
FAQ SchemaHow does the Nano S+ know a recovery phrase is invalid?
The device computes the SHA-256 hash of the first 256 bits of entropy and compares the first 8 bits to the checksum embedded in word #24. If they do not match, it aborts.
Can I test my seed words without resetting the Nano S Plus?
Yes. Install the official "Recovery Check" application from Ledger Live onto your Nano S Plus to test your backup phrase non-destructively.
What happens if I enter 3 incorrect PIN attempts on Nano S+?
Entering three incorrect PINs triggers a full hardware wipe of the Secure Element storage, resetting the device to factory state.