Douglas Harper's Etymology Dictionary
1819, from un- (1) "not" + collectible. Form uncollectable is attested by 1796.
Wiktionary
a. That cannot be collected. alt. That cannot be collected.
WordNet
adj. not capable of being collected; "a bad (or uncollectible) debt" [syn: bad]
Usage examples of "uncollectible".
The syndicate is just going to have to write it off in the uncollectible debts column.
Jewels, gold, silver, platinum, databases, libraries, deeds of property, deeds of trust, certificates of stock ownership, and warrants of uncollectible debt: All were traded here, and every booth had its computer to report transactions to the city recorder the city’s master computer.
Jewels, gold, silver, platinum, databases, libraries, deeds of property, deeds of trust, certificates of stock ownership, and warrants of uncollectible debt: All were traded here, and every booth had its computer to report transactions to the city recorder the city's master computer.
He'd bet any amount of his uncollectible wages that Saidin was well-briefed on the reason for the just slightly early arrival, maybe even on the ATC incident.