uncollectible

[uhn-kuh-lek-tuh-buh l]

adjective

noun

something, as a financial obligation, that cannot be collected: an increase in the company's uncollectibles.

Origin of uncollectible

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

An amount—usually a stated per cent of accounts receivable—annually set aside to cover losses from uncollectable accounts.
Cyclopedia of Commerce, Accountancy, Business Administration, v. 4
Various

1927, from un- + collectable (see collectible).

by 1833, from un- + collectible.