Asus Service Tag Check Jun 2026

| Issue | Cause | Solution | |--------------------------------|------------------------------------------------|----------| | "Invalid Serial Number" | Wrong format (e.g., includes spaces or S/N: ) | Remove non-alphanumeric chars | | No warranty data | Grey market unit / non-ASUS region | Check with original seller | | Service tag not found | Device is consumer-grade (no enterprise tag) | Use S/N instead | | Expired warranty shown | ASUS uses manufacture date if purchase unregistered | Upload proof of purchase | | S/N from wmic = "To be filled" | Motherboard replaced with non-ASUS or generic BIOS | Check physical sticker |

GET https://www.asus.com/support/api/warranty/v1/query?serial=S/N asus service tag check

If the physical sticker is worn or missing, you can find the serial number within your system: How to find product Serial Number and Check Number - ASUS asus service tag check