: The letter will detail exactly why the refund was changed or held.
If you see this topic, you should expect to receive an official letter (CP88 or similar) in the mail within 4 weeks explaining the specific issue.
In the context of the Internal Revenue Service (IRS), refers to your appeal rights regarding a notice that your federal tax refund is being withheld or offset. Understanding Tax Topic 151
: If you believe the IRS is in error, you can file an appeal. For small disputes, you may use IRS Form 12203 (Request for Appeals Review) or a formal written protest for larger amounts.