SOP templatesCustomer Service

Customer Complaint Handling SOP Template

A ready-to-use SOP for logging, investigating, resolving and closing customer complaints fairly, and for spotting recurring issues before they grow.

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Alexa UskovaReviewed by Alexa Uskova, Customer Success Manager, Perfect WikiUpdated September 15, 202612 steps4 roles3 min read
Standard operating procedureSOP-CS-001 ยท Rev 1.0
Owner
Customer Service Manager
Effective date
September 15, 2026
Review cycle
Every 12 months

1.Purpose

To make sure every customer complaint is acknowledged quickly, investigated fairly, resolved within the agent's authority or escalated appropriately, and logged so recurring issues can be identified.

2.Scope

Applies to formal complaints received through any channel about service, product or billing. Routine questions and support requests are covered by the relevant channel SOP, such as call handling, email support or live chat.

Definitions

Complaint
An expression of dissatisfaction about service, product or billing that requires investigation and a response.
Authority limit
The maximum refund, credit or exception an agent can approve without escalating.
Goodwill gesture
A discretionary credit, discount or apology offered to repair a customer relationship.
Root cause
The underlying reason a complaint happened, as opposed to just the symptom the customer reported.

3.Responsibilities

Support Agent
Logs, investigates and resolves complaints within their authority, and communicates outcomes to customers.
Team Lead
Approves resolutions above the agent's authority limit and handles escalated complaints.
Quality Analyst
Reviews closed complaints for recurring themes and reports trends.
Customer Service Manager
Owns the complaint process and acts on trend reports to drive improvement.

RACI matrix

ActivitySupport AgentTeam LeadQuality AnalystCustomer Service Manager
Log and acknowledge the complaintR/AI--
Investigate and determine resolutionRAI-
Approve resolution above standard authorityCR/AIC
Implement and communicate the resolutionR/AI--
Review complaint trendsICR/AI

R = Responsible, A = Accountable, C = Consulted, I = Informed

4.Materials and PPE

Materials, tools and systems

  • โ†’Complaint log or CRM
  • โ†’Refund and goodwill authority matrix
  • โ†’Customer contact and account history
  • โ†’Response time target reference

5.Procedure

  1. 5.1

    Log the complaint

    Support Agent

    The Support Agent logs the complaint with the channel it arrived through, the date, the customer's details and a clear description of the issue.

  2. 5.2

    Acknowledge receipt

    Support Agent

    The Support Agent sends the customer an acknowledgment within the target response time, confirming the complaint has been received and is being looked into.

    Checkpoint: Acknowledgment is sent within the target response window, even if the full resolution will take longer.

  3. 5.3

    Classify the complaint

    Support Agent

    The Support Agent classifies the complaint by category, such as billing, product or service, and assigns a severity based on impact to the customer.

  4. 5.4

    Investigate the complaint

    Support Agent

    The Support Agent reviews the customer's account history, prior interactions and any relevant records to understand what happened.

  5. 5.5

    Escalate if outside authority

    Support Agent

    The Support Agent escalates to the Team Lead when the complaint involves a policy exception, a refund above their authority limit, or a repeated failure to resolve.

    Warning: Never promise a resolution outside your authority limit; escalate first and let the customer know a specialist will confirm next steps.

  6. 5.6

    Determine the resolution

    Support Agent

    The Support Agent, or the Team Lead for escalated cases, decides on the resolution: a correction, refund, replacement, apology or goodwill gesture appropriate to the issue.

  7. 5.7

    Communicate the resolution

    Support Agent

    The Support Agent clearly explains the resolution and any next steps to the customer, in plain language rather than internal process terms.

    Checkpoint: The customer confirms they understand and accept the resolution, or their objection is noted for follow-up.

  8. 5.8

    Implement the resolution

    Support Agent

    The Support Agent processes the agreed refund, replacement or correction within the timeframe communicated to the customer.

  9. 5.9

    Document root cause

    Support Agent

    The Support Agent records the root cause of the complaint and the resolution applied in the complaint log.

  10. 5.10

    Close the complaint

    Support Agent

    The Support Agent closes the complaint record and sends the customer a confirmation that it has been resolved.

  11. 5.11

    Review for recurring themes

    Quality Analyst

    The Quality Analyst reviews closed complaints weekly, grouping them by root cause to spot recurring or emerging themes.

  12. 5.12

    Report trends for improvement

    Quality Analyst

    The Quality Analyst reports significant or repeated complaint trends to the Customer Service Manager so the underlying process issue can be fixed.

6.Quality checks

  • โ†’All complaints are acknowledged within the target response time.
  • โ†’Resolutions above standard authority are approved by a Team Lead before being promised.
  • โ†’Root cause is documented for every closed complaint.
  • โ†’Weekly trend review is completed and reported.

7.Records

  • โ†’Complaint log entry
  • โ†’Resolution and approval record
  • โ†’Weekly trend review notes
  • โ†’Customer confirmation of resolution

8.KPIs

  • โ†’Average time to acknowledge a complaint
  • โ†’Average time to resolve a complaint
  • โ†’Complaint recurrence rate
  • โ†’Customer satisfaction after complaint resolution

9.Common mistakes

  • โ†’Promising a resolution beyond the agent's authority limit.
  • โ†’Closing a complaint without customer confirmation.
  • โ†’Not logging complaints received informally, such as on social media.
  • โ†’Skipping root cause analysis, so the same issue keeps recurring.

10.Revision history

RevisionDateDescriptionReviewed by
1.0September 15, 2026Initial releaseAlexa Uskova

This is a template. Adapt it to your organization, equipment and local regulations before use.

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A customer wants a refund larger than my approval limit, what do I do?

Escalate to your Team Lead as described in step 5.5 rather than approving it yourself or promising the amount to the customer; let them know a specialist will confirm the outcome shortly.Source: step 5.5 ยท Escalate if outside authority
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