Digital Evidence Preservation: How to Preserve Digital Evidence for Cybercrime and Fraud Investigations
Digital evidence can disappear faster than many people realize.
A suspicious website may go offline. A social media account may be deleted. Messages can disappear, online accounts can be modified, and important files may be overwritten or permanently lost.
When cybercrime, fraud, identity theft, account compromise or another online incident occurs, preserving available evidence can be just as important as identifying it.
Digital evidence preservation involves protecting relevant digital information from unnecessary alteration, loss or destruction so it can be examined later as part of an investigation.
This may include evidence from:
- Computers
- Mobile phones
- Email accounts
- Social media
- Messaging applications
- Websites
- Cloud storage
- Online accounts
- Financial platforms
- Cryptocurrency transactions
The objective is to retain relevant information and as much context as possible.
What Is Digital Evidence Preservation?
Digital evidence preservation is the process of protecting potentially relevant digital information so that it remains available for examination.
Unlike physical evidence, digital information can change simply through normal use.
For example:
- New messages may overwrite older data.
- Applications may update automatically.
- Online accounts may change.
- Websites may be modified.
- Files may be deleted.
- Cloud services may synchronize new information.
- Social media content may disappear.
For this reason, preserving evidence early can be an important part of a cybercrime or fraud investigation.
Digital evidence preservation may involve retaining:
- Original files
- Emails
- Messages
- Screenshots
- URLs
- Account information
- Transaction records
- Cryptocurrency wallet addresses
- Transaction IDs
- Relevant timestamps
The appropriate preservation method depends on the type of evidence and the circumstances of the investigation.
Why Is Digital Evidence Preservation Important?
Digital evidence is often temporary.
A person investigating an online scam may discover that:
- The scam website has disappeared.
- The scammer’s social media account has been deleted.
- Messages are no longer available.
- A cryptocurrency platform has stopped operating.
- An email account has been closed.
- Important files have been removed.
Once evidence is lost, recovering it may be difficult or impossible.
Preserving evidence early can help document what existed at the time the incident was discovered.
It can also help investigators reconstruct events later.
Digital Evidence Preservation vs Digital Evidence Collection
Although these terms are closely connected, they are not exactly the same.
Digital Evidence Collection
Digital evidence collection focuses on identifying and gathering relevant information.
For example:
- Collecting emails
- Recording website URLs
- Gathering transaction records
- Saving messages
- Documenting social media profiles
Digital Evidence Preservation
Digital evidence preservation focuses on protecting that information from unnecessary change or loss.
For example:
- Retaining original files
- Documenting when evidence was obtained
- Avoiding unnecessary modification
- Keeping relevant information organized
- Maintaining copies where appropriate
Both processes are important.
Collection identifies and gathers the evidence. Preservation helps protect it.
What Types of Digital Evidence Should Be Preserved?
The answer depends on the incident.
However, potentially relevant evidence may include the following.
Emails
Preserve:
- Original messages
- Sender information
- Recipient information
- Dates and times
- Attachments
- Links
- Account notifications
Original emails can contain information that may not appear in a screenshot.
This can be particularly important in:
- Phishing investigations
- Business email compromise
- Investment scams
- Identity theft
- Account takeover
Text Messages and Messaging App Evidence
Online scams frequently move from one platform to another.
A conversation may begin on social media and later move to a messaging application.
Relevant evidence may include:
- Messages
- Usernames
- Profile information
- Dates and times
- Images
- Files
- Payment instructions
Preserve enough surrounding context to show how the communication developed.
Social Media Evidence
Social media evidence may include:
- Profile URLs
- Usernames
- Display names
- Posts
- Comments
- Direct messages
- Images
- Videos
Accounts can be renamed, deleted, suspended or made private.
Early preservation can therefore be important.
This type of evidence may support:
- Romance scam investigations
- Catfish investigations
- Fake online identity investigations
- Investment scam investigations
- Social media account takeover investigations
Website Evidence
Websites can change without warning.
A suspicious website may:
- Remove certain pages
- Change its contact information
- Stop accepting new users
- Redirect to another domain
- Go completely offline
Relevant information may include:
- Full website URLs
- Screenshots
- Contact details
- Investment claims
- Terms and conditions
- Login pages
- Payment instructions
- Dates and times
Preserving evidence from a suspicious website early can help document what was represented to the victim.
Cryptocurrency Evidence
Cryptocurrency transactions can involve evidence that should be recorded carefully.
Relevant information may include:
- Wallet addresses
- Transaction IDs or hashes
- Cryptocurrency type
- Transaction dates and times
- Exchange records
- Payment instructions
- Related communications
Blockchain transactions may remain publicly visible, but information surrounding the transaction may disappear.
For example, the message instructing someone to send cryptocurrency may later be deleted.
Both the transaction and the surrounding communications can therefore be important.
Financial Evidence
Financial evidence may include:
- Bank transfer records
- Payment confirmations
- Account statements
- Invoices
- Payment requests
- Withdrawal communications
- Transaction references
These records can help establish when funds were transferred and how the financial activity relates to the wider incident.
Computer Evidence
Computers may contain important evidence relating to:
- Files
- Browser activity
- Emails
- Downloads
- Applications
- Account access
- System activity
Normal use of a computer can change information.
Installing software, deleting files or continuing to use the device may affect evidence that could otherwise be relevant.
Where a detailed examination is required, a Computer Forensics investigation may be appropriate.
Mobile Device Evidence
Mobile phones often contain evidence from multiple parts of an incident.
A single device may contain:
- Messages
- Emails
- Screenshots
- Photographs
- Authentication notifications
- Financial applications
- Cryptocurrency applications
- Browser activity
Continuing to use a device can generate new information and change existing data.
Where the device itself is central to the investigation, appropriate forensic procedures may be required.
Cloud and Online Account Evidence
Important evidence may exist entirely online.
Relevant sources can include:
- Email accounts
- Cloud storage
- Social media accounts
- Online financial accounts
- Cryptocurrency services
- Other web-based platforms
Online accounts can be modified, closed or deleted.
Preserving available records, notifications and relevant account information can therefore be important.
How to Preserve Digital Evidence
The correct approach depends on the situation, but several general principles can help.
1. Do Not Delete Relevant Information
Avoid deleting:
- Emails
- Messages
- Files
- Account notifications
- Screenshots
- Transaction records
Even information that appears unimportant may later help establish a timeline.
2. Preserve Original Files Where Possible
Original files may contain information that is not visible in a screenshot or copied version.
For example:
- Original emails may contain technical headers.
- Original photographs may contain metadata.
- Original documents may contain creation and modification information.
Where possible, retain the original alongside any working copies.
3. Record Dates and Times
Dates and times can be essential for reconstructing an incident.
Document:
- When contact began
- When money was sent
- When an account was accessed
- When suspicious activity occurred
- When evidence was collected
A clear timeline can help connect evidence from different sources.
4. Preserve Full URLs
A screenshot of a website may not reveal the complete address.
Where possible, record:
- Full URL
- Website name
- Specific page
- Relevant account identifiers
Different URLs on the same website may contain important differences.
5. Preserve the Context
A single message may not explain what happened.
For example, a message saying:
“Your withdrawal requires another payment.”
may be more meaningful when preserved together with the earlier messages explaining the investment, deposits and withdrawal request.
Preserve relevant surrounding communications where possible.
6. Avoid Unnecessary Changes
Opening, editing, moving or converting files can sometimes alter information.
Avoid unnecessarily:
- Editing original files
- Renaming evidence without documentation
- Modifying messages
- Changing account information
- Resetting devices
If security requires immediate action, account or device protection may take priority. The circumstances should determine the appropriate response.
Digital Evidence Preservation for Online Scam Victims
Online scams often involve evidence spread across several platforms.
For example:
Social media contact
↓
Messaging conversation
↓
Investment platform
↓
Payment instructions
↓
Cryptocurrency or bank transfer
↓
Withdrawal problem
Each stage may contain relevant evidence.
Preserving only the final payment request may not provide the complete picture.
A stronger evidence record may include the entire sequence.
Digital Evidence Preservation for Cryptocurrency Scams
If cryptocurrency was sent as part of a suspected scam, preserve:
- Wallet address
- Transaction ID
- Amount sent
- Cryptocurrency type
- Date and time
- Exchange records
- Payment instructions
- Messages relating to the transaction
Do not assume that screenshots alone contain all the information needed for further analysis.
Transaction identifiers and wallet addresses may be particularly important for blockchain tracing.
Digital Evidence Preservation for Account Takeover
If you suspect that an account has been compromised, relevant evidence may include:
- Login alerts
- Password reset notifications
- Recovery changes
- Security emails
- Suspicious messages
- Unauthorized transactions
- Screenshots of account activity
However, security should also be considered.
If an account is actively compromised, immediate protective action may be necessary.
The circumstances will determine whether evidence preservation, account recovery or both should be prioritized.
Digital Evidence Preservation for Identity Theft
Identity theft can involve multiple accounts and platforms.
Relevant evidence may include:
- Fake profiles
- Fraudulent messages
- Screenshots
- Websites
- Account notifications
- Financial activity
- Emails
Preserving the connection between these different sources can help investigators understand how an identity was used.
Chain of Custody and Digital Evidence
In some investigations, it may be important to document how evidence was handled.
This is often referred to as a chain of custody.
Documentation may include:
- Where the evidence originated
- When it was obtained
- Who collected it
- How it was stored
- Whether copies were created
- Who had access to it
The level of documentation required depends on the circumstances and the intended use of the evidence.
Where evidence may be used in legal or formal proceedings, proper documentation can become particularly important.
Can Screenshots Be Used as Evidence?
Screenshots can be useful for documenting online information.
However, screenshots may not capture:
- Complete URLs
- Full conversations
- Account identifiers
- Technical information
- Metadata
- Surrounding context
A screenshot should therefore be treated as one possible form of evidence rather than automatically being the complete record.
Where possible, preserve additional information alongside screenshots.
What Happens If Digital Evidence Is Deleted?
Deleted evidence may sometimes remain available.
Potential sources can include:
- Cloud backups
- Other devices
- Email records
- Synchronised accounts
- Transaction records
- Other participants in a communication
However, recovery cannot be guaranteed.
The longer evidence remains deleted or unavailable, the greater the possibility that it may become more difficult to recover.
Why You Should Not Rely Only on Memory
After a cybercrime or fraud incident, it can be difficult to remember:
- Exact dates
- Account names
- Website addresses
- Payment amounts
- The sequence of communications
Creating an organized evidence record can reduce reliance on memory.
A timeline containing messages, transactions and important events can help establish a clearer understanding of what occurred.
Creating a Digital Evidence Timeline
A timeline can organize evidence chronologically.
For example:
March 3
Initial contact through social media
↓
March 5
Conversation moved to a messaging application
↓
March 10
Investment platform introduced
↓
March 12
First payment sent
↓
March 20
Additional deposit requested
↓
April 2
Withdrawal requested
↓
April 3
Additional payment demanded
A timeline can connect communications with financial or account activity.
Digital Evidence Preservation for Businesses
Businesses may need to preserve evidence following:
- Cyberattacks
- Data breaches
- Employee misconduct
- Business email compromise
- Financial fraud
- Unauthorized access
- Intellectual property theft
Evidence may exist across:
- Company computers
- Mobile devices
- Email systems
- Cloud platforms
- Employee accounts
- Security systems
The scope of evidence preservation should be appropriate to the incident and conducted with the necessary authority.
Can Digital Evidence Be Used in an Investigation?
Digital evidence may be relevant to:
- Cybercrime investigations
- Fraud investigations
- Civil disputes
- Regulatory matters
- Employment investigations
- Other legal proceedings
The usefulness of evidence may depend on factors such as:
- Relevance
- Authenticity
- Context
- Preservation
- Documentation
- Applicable legal requirements
An investigation should avoid overstating what the evidence proves.
Common Digital Evidence Preservation Mistakes
Several actions can unintentionally make an investigation more difficult.
Deleting Messages
A message that appears unimportant may later provide context.
Only Taking Screenshots
Screenshots may not capture all relevant information.
Forgetting to Save URLs
A website screenshot without the full URL can be more difficult to investigate.
Continuing to Use a Potentially Important Device
Normal device activity can create or change information.
Failing to Record Dates
Dates and times can be essential for reconstructing events.
Separating Evidence From Its Context
An isolated message may be difficult to interpret.
What Can Digital Evidence Preservation Help Establish?
Depending on the available evidence, preservation can help retain information concerning:
- What occurred
- When events occurred
- Which accounts were involved
- What communications took place
- What websites or platforms were used
- How funds were transferred
- How different pieces of evidence may be connected
The available evidence determines what can ultimately be established.
Need Help Preserving Digital Evidence?
If you have been affected by an online scam, cryptocurrency fraud, account compromise, identity theft or another digital incident, preserving relevant evidence may be an important first step.
Our investigation team can assess the information available and identify potential sources of digital evidence relevant to the circumstances.
Evidence may include communications, account information, website records, financial transactions, cryptocurrency records, computers and mobile devices.
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