If buyer can't provide customs clearance documentation....?

I was wondering what happens if the buyer is not able to provide customs clearance documentation to get his/her shipment released from their customs? Is that going to be the seller's fault for "item not received" or will that be against the buyer?

I just want a heads up in case they decide to open up a case later claiming item not received case.
Tracking will show it was shipped out and arrived in their country but was held for customs clearance and needed some documentation to be cleared.

I was told that the package couldn't be returned to me (my dropshipper) so someone is going to lose money (either me or the buyer) if they can't get it released and I can't get it back for refund.

Uh oh?

If you did not disclose the documentation requirements for receiving the shipment, or your supplier improperly filled out the customs documents, then you're liable for the non-delivery. (You might be able to get a refund from your supplier, but that's a longshot.)

If you want to avoid an ebay dispute, you need to be in daily contact with your buyer, your supplier, and customs, and be ready to provide a full refund as soon as it's clear that the delivery isn't going to happen within a reasonable timeframe.

Thanks for the reply!