What does NPB stand for?

Non-Paying Buyer (eBay)

This definition appears very rarely and is found in the following Acronym Finder categories:

Business, finance, etc.

Other Resources:

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National Productivity Board (Singapore) Naval Project Brief Navigation Processor Board Neon Party Ball Network Provisioning Bulletin Neutral Particle Beam Newport Beach (California) Nickel-Plated Brass Nippon Professional Baseball (Japan) Non-Paying Bidder (eBay auctions)		Non-Protection Basis (India) Non Pigmented B16 Melanoma Cells Nairobi Provincial Boxing Association National Paper Box Association (Alexandria, VA) National Park of Banc d’Arguin National Pawn Brokers Association National Pet Breeders Association National Playground Ball Association National Police Bloodhound Association National Powerboat Association

Samples in periodicals archive:

As a last resort for the people mentioned above, as well as for the frivolous bidders, you could follow the Non-Paying Buyer process that eBay has put at your disposal.

How to Deal with Nonpaying Bidders on Ebay

Taking further steps to minimize non-paying buyers, the company will begin in July to limit the number of bids a user with non-paying buyer complaints can make.

eBay Announces PayPal Buyer Protection Program at eBay Live