Guide
Receipt Prefix Guide
Receipt prefixes can hint at service-center routing and are useful for selecting pace assumptions in estimate models.
What a prefix does
A prefix helps map your case to a center-level pace profile; it does not guarantee exact processing time.
Privacy-safe input
Use a prefix-plus-segment format only. Avoid entering full sensitive identifiers in public tools.
Frequently Asked Questions
Should I enter my full receipt number?
No. Use only privacy-safe partial format when a tool requests it.
Try the estimator
Ready to test your own inputs? Use the interactive tool on the home page and compare your estimate window against this guide.