Secure file sharing for law firms is about more than getting a large document from one person to another. The firm also needs to know who can access it, how the recipient is verified, what happens when the matter changes, and whether the exchange can be reviewed later.
Email attachments can be inconvenient for large files and make access difficult to manage after a message is sent. A secure portal, managed file transfer service, or business file-sharing workspace can offer a more controlled process, provided it is configured to fit the work. The right choice depends on the sensitivity of the documents, who needs access, and the firm’s policies and client requirements.
Choose a tool based on the exchange
Different tools suit different situations. Compare how a service will be used in practice, not just the security features listed by its provider.
- Client portal: Useful when clients need a consistent place to send and receive matter documents. Look for a way to keep each client or matter’s files separate and manage access for the relevant people.
- Managed file transfer: A potential fit for sending or receiving large files through a defined, trackable process, especially when the exchange is occasional or has specific handling requirements.
- Business file-sharing workspace: May work well when staff and authorized outside parties need to collaborate on files over time. Confirm that external access can be limited to the appropriate files and people.
A client portal is not automatically safer than email just because it is a portal. Its value depends on controls such as recipient verification, permissions, access removal, and the firm’s day-to-day procedures. Likewise, cloud storage can be used to share confidential documents, but the firm should assess the provider’s security and data-handling terms and configure the service carefully.
Security features to look for
Use a practical checklist when comparing providers. A feature only helps if the firm can apply it consistently and understands how it works.
- Recipient authentication: Check how the service confirms a recipient’s identity. Consider whether access requires a sign-in or another appropriate verification step, rather than relying on a link that anyone can forward.
- Least-privilege access: Give each person access only to the files they need. Check whether permissions can be set for an individual, a matter, or a particular folder, and whether viewing and downloading can be controlled separately.
- Encryption: Ask how files are protected during transfer and while stored. Review the provider’s explanation and terms rather than treating a general security label as a complete answer.
- Access logs: Find out whether the firm can review who accessed a file and when. Decide what records the firm needs to retain for its own process.
- Access expiry and removal: Confirm that the firm can set an access end point, revoke access, and remove or replace a shared link when it is no longer needed.
- Retention and deletion: Understand what happens to files and backups when the firm deletes a document or ends its use of the service. Review the provider’s data-handling and deletion terms.
- Administrative controls: Check who can create sharing links, invite external users, change permissions, and manage accounts. Limit those abilities to appropriate staff.
NIST’s guidance on security considerations for exchanging files over the internet can be a useful reference when discussing how file exchanges are handled.
Build a safer sending and receiving workflow
A consistent workflow helps prevent mistakes, including sharing a file with the wrong person or leaving access open longer than intended.
- Assess the file and recipient. Identify the matter, the sensitivity of the material, and who is authorized to receive it. Check client instructions and any applicable firm policies before choosing a sharing method.
- Prepare a matter-specific space. Use a folder, portal area, or transfer that is clearly tied to the appropriate client or matter. Avoid broad access to unrelated documents.
- Check the recipient before sharing. Verify the recipient using a trusted method, especially when an address or request is unfamiliar or has changed. Confirm that the selected account or invitation belongs to the intended person.
- Set narrow permissions. Grant only the access needed for the task. Set an appropriate end point where available, and avoid using a public or unrestricted link for confidential material.
- Tell the recipient how to respond. Provide clear instructions for accessing the files and, when the client needs to send documents back, how to upload them through the approved channel. Do not ask clients to reply with sensitive attachments if the firm intends them to use a portal or transfer service.
- Keep an appropriate record. Record what was shared, with whom, and through which approved process when the firm’s procedures call for it. Review available access logs as appropriate.
- Close access when it is no longer needed. Revoke invitations or links, review permissions, and handle retention or deletion according to the firm’s policies and applicable requirements.
For related access practices, see this guide to reviewing access during employee offboarding. Its principles around removing unneeded access also apply when a client, outside party, or matter no longer needs access to shared files.
Questions to ask a file-sharing provider
Provider review should cover more than whether a service can transfer a large file. Ask how access is authenticated and limited, what activity can be logged, and how the firm can revoke access. Ask where data is handled, what the provider’s retention and deletion terms say, and how the service supports the firm’s own recordkeeping and security procedures.
Also ask how administrators manage external users, what happens if a user account is compromised, and what support is available when the firm needs help. Review the provider’s terms alongside client requirements and the firm’s policies. For a broader view of evaluating IT controls, see what an IT support audit can help a business review.
No file-sharing service should be treated as a substitute for the firm’s own policies and judgment. The firm remains responsible for deciding what can be shared, who is authorized, and how records should be managed.
Frequently asked questions
How can a law firm securely share large files with a client?
Choose an approved portal, managed transfer service, or business workspace that fits the exchange. Verify the recipient, limit access to the relevant matter, and remove access when it is no longer needed.
Is a client portal safer than sending documents by email?
It can provide more control over access and removal, but a portal is not automatically safer. The provider’s safeguards, configuration, and the firm’s procedures all matter.
Can a law firm use cloud storage to share confidential documents?
Yes, if the firm has assessed the service and its terms, configured access appropriately, and confirmed that its use fits client requirements and firm policies.
How should a firm handle access when a matter ends?
Review who still has access, revoke invitations or links that are no longer needed, and follow the firm’s retention and deletion procedures for the files and any related records.
Make secure sharing part of the matter workflow
Secure client file sharing works best when the tool and the process support each other: verify recipients, limit permissions, keep useful records, and close access when the exchange is complete. Zevonix provides IT support for law firms, including confidential, privacy-focused IT. To discuss file-sharing safeguards as part of your firm’s IT environment, contact Zevonix.