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Third-party seller

A third-party seller is a person or business that sells goods or services to customers through an online marketplace operated by another company, rather than as the operator of the marketplace itself.

In plain English

This means the seller is separate from the company that runs the marketplace. It is a person or business using that company's online marketplace to sell goods or services to customers.

In context

Here, "third-party seller" indicates that the seller is an outside person or business using the marketplace, not the company that operates the site.

Situation
Browsing product availability, variants, stock, condition, and seller information
What it communicates
identifies the seller as an outside seller rather than the site operator.

Meaning limits

By itself, this term does not identify which person or business the seller is, only that it is not the marketplace operator.

Examples

“She bought the case from a third-party seller through an online marketplace rather than from the company that runs the site.”

Core meaning

“When the parcel was missing, the customer wrote to the third-party seller through the marketplace.”

In context