When you are working in customer support, there will be times when you do not understand what a customer is saying. This can happen because of a poor connection, a strong accent, unfamiliar technical terms, or a confusing explanation. The most professional response is not to pretend you understand. Instead, you should use a clear, polite phrase that shows you are listening and want to help. This article gives you the exact phrases, tone guidance, and practice you need to handle these moments with confidence.
Quick Answer: What to Say When You Do Not Understand
If you need a fast, professional phrase, use one of these three options:
- “I am sorry, I did not catch that. Could you please repeat it?” – Use this for phone or voice calls.
- “Could you clarify what you mean by [specific word]?” – Use this when a single term is confusing.
- “I want to make sure I understand correctly. Are you saying that…?” – Use this to check your understanding without sounding lost.
These phrases are polite, clear, and keep the conversation moving forward.
Understanding the Context: Formal vs. Informal
The way you say you do not understand depends on the channel and the relationship with the customer. In email or live chat, you have time to choose your words carefully. On a phone call, you need to react quickly but still sound professional.
Formal Context (Email or High-Value Customers)
In formal situations, use complete sentences and avoid contractions. Show respect and patience.
Example email phrase:
“Thank you for your explanation. I would like to confirm my understanding of one point. Could you please elaborate on the issue with the invoice number?”
Informal Context (Chat or Repeat Customers)
With regular customers or in live chat, you can be slightly more direct but still polite.
Example chat phrase:
“Sorry, I missed that last part. Can you say it again?”
Comparison Table: Phrases for Different Situations
| Situation | Best Phrase | Tone | Channel |
|---|---|---|---|
| You did not hear clearly | “I did not catch that. Could you repeat it?” | Polite, neutral | Phone, voice |
| You do not understand a term | “Could you clarify what [term] means?” | Formal, respectful | Email, chat |
| You want to confirm your guess | “Let me check if I understand. Do you mean…?” | Helpful, careful | All channels |
| The explanation is too complex | “Could you simplify that for me?” | Polite, direct | Phone, chat |
| You need more details | “Could you provide more context?” | Formal, professional |
Natural Examples in Customer Support Conversations
Here are realistic exchanges that show how to use these phrases naturally.
Example 1: Phone Call – Poor Connection
Customer: “Yeah, I need the serial number for the RMA process, but I can’t find it on the back of the unit.”
Support Agent: “I am sorry, the line cut out for a moment. Could you repeat the part about the serial number?”
Customer: “Sure. I said I cannot find the serial number on the back.”
Support Agent: “Thank you. Let me help you locate it.”
Example 2: Live Chat – Unfamiliar Term
Customer: “I need to reset the gateway because the DHCP lease expired.”
Support Agent: “Could you clarify what you mean by ‘DHCP lease’? I want to make sure I give you the right steps.”
Customer: “It means the IP address assignment timed out.”
Support Agent: “Understood. Let me guide you through the reset.”
Example 3: Email – Complex Explanation
Customer: “The issue is with the reconciliation of the batch file against the ledger entries from last quarter.”
Support Agent: “Thank you for the details. To ensure I address your concern correctly, could you provide more context about the specific ledger entries that do not match?”
Common Mistakes When Saying You Do Not Understand
English learners often make these errors. Avoid them to sound more professional.
Mistake 1: Saying “I don’t understand” without a reason
Wrong: “I don’t understand.”
Why it is a problem: It sounds blunt and can make the customer feel frustrated.
Better alternative: “I want to make sure I help you correctly. Could you explain that part again?”
Mistake 2: Using “What?” or “Huh?”
Wrong: “What?”
Why it is a problem: It is too informal and can seem rude in a professional setting.
Better alternative: “Pardon me?” or “Could you repeat that?”
Mistake 3: Pretending to understand
Wrong: “Okay, I see.” (when you do not see at all)
Why it is a problem: You will give the wrong answer later, and the customer will lose trust.
Better alternative: “Let me confirm. Are you saying that the payment did not go through?”
Mistake 4: Using “You are not clear”
Wrong: “You are not clear.”
Why it is a problem: It blames the customer. It sounds accusatory.
Better alternative: “I am not entirely clear on that point. Could you help me understand?”
Better Alternatives for Common Phrases
Sometimes you need to vary your language. Here are better alternatives for common situations.
When you need a repetition
- Instead of: “Say that again.”
Use: “Could you repeat that, please?” - Instead of: “I missed it.”
Use: “I did not catch that last part.”
When you need clarification
- Instead of: “What does that mean?”
Use: “Could you clarify what you mean by [word]?” - Instead of: “I am confused.”
Use: “I want to be sure I understand correctly.”
When you need to confirm
- Instead of: “Is that right?”
Use: “So, just to confirm, you are saying that…?” - Instead of: “Are you sure?”
Use: “Could you double-check that detail for me?”
When to Use Each Type of Phrase
Knowing when to use a phrase is as important as knowing the phrase itself.
- Use a repetition phrase when the audio is bad, the customer speaks too fast, or you simply missed a word. Example: “I am sorry, I did not catch your name. Could you repeat it?”
- Use a clarification phrase when you hear the words but do not understand the meaning. Example: “Could you clarify what ‘back-end error’ means in this case?”
- Use a confirmation phrase when you have a guess and want to check. Example: “Let me see if I have this right. You want to upgrade your plan but keep the same billing date?”
- Use a simplification request when the customer gives a very technical or long explanation. Example: “I appreciate the details. Could you simplify the main issue for me?”
Mini Practice Section
Test yourself with these four situations. Read the scenario, then check the suggested answer.
Question 1
Situation: A customer calls and says, “I need to escalate this because the previous agent didn’t log the ticket correctly.” You did not hear the word “escalate.” What do you say?
Answer: “I am sorry, I did not catch that last word. Could you repeat what you need to do?”
Question 2
Situation: A customer writes in chat: “The firmware update caused a kernel panic.” You do not know what “kernel panic” means. What do you say?
Answer: “Could you clarify what you mean by ‘kernel panic’? I want to make sure I find the right solution.”
Question 3
Situation: A customer explains a problem for two minutes. You think you understand, but you are not 100% sure. What do you say?
Answer: “Thank you for the explanation. Let me confirm: you are saying that the error appears after you click ‘Submit,’ correct?”
Question 4
Situation: A customer uses very technical jargon that you cannot follow. You need a simpler explanation. What do you say?
Answer: “I want to help you as quickly as possible. Could you explain the main problem in simple terms?”
Frequently Asked Questions
1. Is it okay to say “I don’t understand” in customer support?
It is better to avoid the direct phrase “I don’t understand” because it can sound like you are giving up. Instead, use a phrase that shows you are actively trying to understand, such as “Could you help me understand that part?”
2. What if the customer gets angry when I ask them to repeat?
Stay calm and apologize briefly. Say something like, “I apologize for the inconvenience. I just want to make sure I get this right for you.” Most customers will appreciate your effort to be accurate.
3. Should I use the same phrase every time?
No. Vary your phrases to sound more natural. If you always say “Could you repeat that?” it can sound robotic. Use the alternatives in this guide to keep your language fresh.
4. How do I say I do not understand in an email?
In email, you have more time. Write a polite sentence like, “Thank you for your message. To ensure I address your concern correctly, could you provide more details about the specific error message you are seeing?”
Final Tips for Real Conversations
Remember that admitting you do not understand is a sign of professionalism, not weakness. Customers prefer an honest agent who asks for clarification over one who guesses and makes mistakes. Practice these phrases until they feel natural. For more help with polite ways to ask for information, visit our Customer Support Conversation Polite Requests section. If you want to practice replying to common problems, check our Customer Support Conversation Practice Replies. And for more guides like this one, see our Customer Support Conversation Problem Explanations category.
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