Respected Sir/ Madam,
This email is in reference to the credit card that is being used by you bearing credit card number ______________ (mention credit card number).
It is to inform you that we have noticed no transaction from your credit card for the last ____________ (mention duration) and as a result of which we have decided to close your credit card account. We have tried reaching out to you to discuss the same but we were unable to contact you.
We expect that this will not be affecting your daily affair. In case, you want to report the same, you may contact us at ___________ (mention contact details).
[Digital Signature – if applicable]
____________ (Contact details)