Create an SMS Inbox Retention and Redaction Policy
Use a purpose-based SMS retention worksheet, practical redaction rules and deletion checks to reduce unnecessary exposure of customer information.
By PhoneBorn Team5 min read
Quick answer: define why each message category is kept, who needs access and what ends the retention period. Keep verification secrets out of tickets and shared files. A practical policy should cover your exported copies and screenshots as well as the provider inbox; it cannot promise deletion controls that a provider does not offer.
Begin with the copies you create yourself
A customer sends an appointment detail by SMS. An employee copies it into a support ticket, adds a screenshot to a team chat and downloads another copy during troubleshooting. Even if the original message later disappears, the business may still hold three unnecessary versions.
Map those destinations before selecting a retention period. Include local downloads, browser screenshots, ticket attachments, shared drives and any permitted operational logs. Assign a responsible person to each destination. The exercise is about reducing avoidable exposure, not claiming that a particular number product makes the business compliant with every privacy law.
Classify messages by purpose rather than convenience
Avoid a single rule that says all SMS must be kept forever because someone might need them. Separate transient verification, customer-service communication, billing-related messages and unsolicited content. For each category, decide whether the message body is necessary after the task is complete.
| Category | Working decision to document |
|---|---|
| One-time verification | Do not copy the code into a case record |
| Appointment or service request | Retain only the details needed for the task |
| Delivery investigation | Prefer timestamps and references over full bodies |
| Unsolicited message | Avoid forwarding or building unnecessary archives |
| Disputed customer instruction | Escalate preservation decision to the responsible owner |
These are planning prompts, not universal legal retention periods. A requirement to preserve particular evidence should be assessed by the appropriate person before routine deletion proceeds.
Choose an event that starts the retention clock
“Delete after the project” is ambiguous if nobody defines project completion. Specify the event: support case closed, appointment completed, investigation resolved or an approved preservation requirement released. Then choose a period that fits the purpose and applicable obligations.
The FTC's business information-security guide recommends keeping only information the business needs. NIST SP 800-122 provides a broader reference for protecting personal information. Your chosen schedule still requires a reason tied to your own work, systems and responsibilities.
Redact before sharing diagnostic evidence
For most delivery investigations, support needs the order reference, service, approximate request time and observed status. It rarely helps to broadcast a valid OTP, an entire customer conversation or a full payment screenshot containing unrelated account details.
Use a simple pre-send review: remove verification codes, secrets, unnecessary names and unrelated message threads; mask numbers where the complete value is not required; inspect the final exported image for readable remnants. Redacting the visible layer in one editor may not remove information from the underlying original file. Share only the prepared export through the approved channel and keep access to the original restricted if it must be preserved.
Write a policy that matches available controls
Do not state that a provider automatically deletes messages after your chosen period unless that feature has been verified. For PhoneBorn, check current privacy information and ask support about any retention or deletion requirement that is essential to your business. Rely only on retention, deletion, export and access controls the provider confirms are supported.
Your policy can still control staff behaviour: which messages may be copied, where approved extracts go, who can view them and when company-created copies are reviewed. Describe unavailable provider controls as a limitation requiring a decision, not as an implemented safeguard. If a requirement cannot be satisfied, choose an appropriate service or revise the workflow before collecting the information.
Test deletion as an operational task
Give the policy owner a short monthly sample: choose a closed case, find its permitted evidence and inspect the places where staff normally copy material. Check whether expired company-held copies were removed and whether any exception has an owner and a review date.
Use non-sensitive sample content rather than purchasing a number or requesting a live OTP merely to test filing practices. Record the result without reproducing the material you were trying to minimise. For evidence sent to support, follow the delivery support-report checklist. If an exposure is discovered, use the organisation's incident process; quietly deleting one attachment may not address other copies.
Frequently asked questions
Should we save OTPs to prove that verification worked?
Usually a status, timestamp and authorised test reference provide safer evidence than the secret itself. Do not retain raw OTPs in routine tickets. Preserve sensitive evidence only through an approved process when there is a specific justified need.
Can a fixed thirty-day rule make us compliant?
No single duration establishes compliance. Purpose, applicable obligations, contract requirements and system capabilities all matter. Get the relevant specialist input where needed instead of treating this operational worksheet as legal advice.
What if a provider cannot delete the original message on demand?
Document the limitation and assess whether the service fits your requirements. Restrict unnecessary company copies immediately, but do not describe that step as deletion of data you cannot control. Ask the provider for its current policy and available supported options.