Invalid seed recovery service for cryptocurrency holders

Specialist cryptocurrency seed recovery phrase service. Designed to address "Recovery phrase is invalid, retry" errors. A confidential service with free consultation for high‑value crypto asset (minimum £500,000) holders.

“At IT Security Locksmith, we believe in being open and transparent with clients, which is why we emphasise from the outset: cryptocurrency seed recovery is complex, highly specialised, and cannot be guaranteed.” — Jon Evans, Founder

Executive Summary

For organisations that hold or process significant cryptocurrency assets, the BIP39 seed phrase represents the final line of defence. When that recovery phrase fails, the consequences can be catastrophic. Invalid seed phrases typically arise from transcription errors, incorrect word ordering, substituted words or incomplete documentation — often only discovered during a crisis.

Who We Work With

This service is designed exclusively for:

• Companies and individuals recovering £500,000+ in cryptocurrency
• Organisations based in the UK, EU, Switzerland, Norway, Canada, Australia or New Zealand.
• Clients who require strict compliance, confidentiality and on‑site processing.

Why choose Us

• UK‑registered business (Companies House number 14853879)
• Operating since May 2023
• Founder with extensive financial services sector experience
• Mutual NDAs to protect both your assets and our intellectual property
• Familiar working directly with compliance, legal and cybersecurity teams

Recovery phrase is invalid

When a wallet rejects a seed recovery phrase, it is almost always due to human error:

• Words written down incorrectly
• Words out of order
• Extra or missing words
• Formatting or transcription mistakes
• Misheard or mis-transcribed entries from hardware devices

These errors render 'normal' wallet recovery impossible. However, they often introduce structure, which can be exploited via targeted analysis.

Test Your Recovery Seed Phrase Now!

Most organisations maintain multiple wallets and carefully record their recovery seed phrases—but very few actually test them.

The first time many companies attempt recovery is during a crisis:

• A key employee leaves
• Hardware fails
• Access credentials are lost
• A wallet migration is required

At that moment, seeing “Recovery phrase is invalid, retry” can be devastating.

Testing and validating your seed phrase before it’s needed is one of the smartest risk‑management decisions a company can make.

For some unfortunate companies the first time they know they have a problem is when they resort to recovery in a time of stress only to find it does not work. The error message “Recovery phrase is invalid, retry” is displayed and you get that sinking feeling.

If you know your recovery phrase doesn't work but you still control the wallet at least you can transfer the funds to a wallet you have full control over!

Why Seed Phrase Recovery Is So Difficult

Recovering an incorrect 24‑word seed phrase is a non‑trivial cryptanalytic challenge. Even if you know all 24 words but not the order, there are:

24! which is 620 sextillion permutations.

Which is 24 digits long an looks like this 620,448,401,733,239,439,360,000.

Even with our GPU compute infrastructure, a brute‑force search would require hundreds of millions of years—which is why BIP39 seed recovery phrases are so secure. To enable recovery, there must be structure or a limited failure pattern. This is where our service comes in.

What Makes Our Recovery Service Different

1. Enterprise Grade Cyber Security Expertise
   Our founder has over 25 years of experience in financial services (HSBC, Barclays, UBS, Rothschild & Co) in Information and IT Security. Key skills and achievements include building and deploying secure messaging systems, managing dual control fund transfer systems, managing Public Key Infrastructure and digital certificates and carrying out security investigations. Digital resilience skills include managing business continuity and disaster recovery co-ordination for major technology divisions, failure analysis and root cause analysis following major problems and incidents. All of these skills are transferable and applicable to our seed recovery service.
2. Cryptanalysis techniques
   This service utilise various cryptanalysis techniques such as chosen-plaintext pattern matching, cryptographic testing and targeted or limited brute force. These skills enable us to generate potential recovery seed phrases for testing.
3. Blockchain and Wallet Architecture expertise
   Knowledge of BIP39, wallet derivation paths, hardware wallets, and blockchain address generation across major cryptocurrencies. These skills enable us to derive the coin addresses we're targeting as potential recovery seed phrases and to compare them against the one provided. If they match we've successfully determined your recovery seed phrase.
4. Full Compliance and Governance
   We operate to corporate standards:
   • KYC and AML checks
   • Formal contracts
   • Mutually binding NDA
5. On Site, Air Gapped Processing
   All recovery attempts take place at your office, using equipment that:
   • Is fully air gapped
   • Remains your property after the engagement
   • Ensures your seed phrase never leaves your environment

Our Three‑Stage Engagement Model

The following three stages outline our general approach to attempting recovery. Every client engagement is different which means the contract defines the exact steps we will take.

Stage 1 — Free Feasibility Assessment

We conduct a confidential consultation to understand:

• How the seed phrase was recorded - we don't need the actual phrase!
• Ideally we will speak to the people that created the recovery seed phrase
• Wallet type, metadata and derivation details
• Your security constraints and compliance requirements

There are three possible outcomes to this stage

• Yes - we think we can help
• Maybe - we are not sure and need more time to think about it
• No - we do not think recovery is feasible

Stage 2 — Complimentary Initial Analysis

If recovery appears feasible:

• We begin analysis at no cost to you
• Your actual seed phrase is not required at this stage
• We assess likely error patterns
• We construct a tailored recovery plan
• We prepare tooling and hardware if applicable

When we are ready we will schedule a live demonstration of our capability. This will require both parties to sign a mutual non-disclosure agreement. Our demonstration will showcase what we can and can not do for the specific situation you have described.

At the end of this demonstration you should have enough information to decide whether to proceed or not. It is worth stressing that up to this point the service has been free with no charges incurred by you only by us.

We must stress this is a very important decision. It is up to you to determine if it is in your interest to proceed with the recovery attempt based on our demonstration. An attempt that will cost you money. Only you can make that decision based on what what you thought of our demonstration and what's at stake.

Recoverable situations often include:

• Transcription errors and minor inconsistencies
• Wrong word from the BIP39 list
• Mis-ordered words (with neighbourly proximity)
• Missing words from BIP39 list (timeframe dependent)

Not typically recoverable:

• Entire seed phrase is suspected to be wrong or in the wrong order
• Many missing words - typically more than 4
• Many words in wrong order

Stage 3 — Formal Recovery Engagement and fees

If you proceed:

• A legally binding contract is signed
• It is only at this point we require an initial payment to cover work carried out under stages 1 and 2, planned effort to improve our capabilities based on your challenge and other costs that arise - this is non-refundable
• Full KYC/AML checks are performed
• Hardware/tooling is procured

Only when KYC and AML checks are successfully passed can we proceed with:

• Recovery attempt on-site at your offices - date and location to be agreed
• Every effort is taken to ensure your seed phrase remains confidential
  • The seed phrase will be recorded in an indexed file
  • Our software can display the index or the actual word - for added privacy we will set it to index only
  • Our software does not store cryptographic keys on disk. They are only used to derive public keys for comparison with the one/s you have provided and are looking to recover.
  • We can use your desktop/laptop device configured to our requirements or we provide the laptop which you will retain ownership at the end of the engagement.
• Desktop or laptop devices will need to be air-gapped meaning flight mode is enabled and network device drivers disabled for both wired and wireless interfaces.
• For added security you can assign an 'observer' to monitor our access and to ensure the confidentiality of your seed phrase.

Upon Successful Recovery (where you regain access and control of the recovered accounts)

• A second payment is made immediately - as detailed and agreed in the contract
• A third and final payment is due within 30 days as detailed in the contract
• If you are a UK company you need to add VAT to all payments.
• There are no hidden fees.
• The total cost of the contract to be agreed during negotiations following the live demonstration of our capabilities.

If recovery is unsuccessful:

• No further payment is required.

Eligibility Criteria

This service is offered exclusively to:

• Companies or individuals recovering over £500,000 GBP in crypto assets
• Clients located in the UK, EU, Switzerland, Norway, Iceland, Canada, Australia or New Zealand.

Book a Confidential Consultation

Seed phrase issues are stressful, but in many cases recovery is possible. We offer a free, confidential assessment to help determine feasibility with no obligation.

A specialist cryptocurrency seed recovery phrase service designed with compliance, security and confidentiality with on-site processing for high‑value corporate cryptocurrency holders.

Book your free confidential assessment by emailing us at contact@itsecuritylocksmith.co.uk.

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