How do I fix "Invalid Duration"?

Use GTC (Good Till Cancelled) for fixed-price listings or Days_N (e.g., Days_7, Days_30) for auctions.

eBaycompliance

Invalid Duration

The Duration value does not match a recognized eBay listing duration format.

What is this issue?

The Duration value does not match a recognized eBay listing duration format.

Affected field:Invalid Duration

Why eBay rejects this

An unrecognized duration may default to a short auction window or cause the listing to be rejected.

Fix in StriveFormats

Upload your CSV to StriveFormats to detect this issue across all rows, with clear line-by-line reporting.

Open CSV Fixer View template eBay Fixer guide eBay ecommerce guide

Fix in Excel

1Review the Invalid Duration column for incorrect values.
2Fix any cells that do not match the expected format.
3Save as CSV (Comma delimited).

Fix in Google Sheets

1Review the Invalid Duration column for incorrect values.
2Correct any cells that do not match the expected format.
3Go to File > Download > Comma Separated Values (.csv).

Prevent it next time

--Start from the official platform template to avoid structural issues.
--Run your file through StriveFormats before every import.
--Test with a small sample file first to catch errors before they affect your full catalog.

How StriveFormats detects this

StriveFormats parses every row of your CSV and applies eBay-specific validation rules to the Invalid Duration field. Any row that violates the rule is flagged with the row number and the specific value that caused the issue.

►Technical detail

eBay's importer validates the Invalid Duration field against its official import specification. Values that do not meet the expected format are flagged to prevent silent data corruption -- an invalid value that slips through import might appear as a blank field, a zero, or incorrect text in your storefront without any error message after the fact.