Difference between Invalid and Uncollectible

INVALID vs UNCOLLECTIBLE: NOUN

A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health who is unable to care for himself.
One who is confined to home or bed because of illness, disability or injury
Any person with a disability.
Hence Something that is damaged, or the worse for wear, but not so much as to be wholly unserviceable.
An infirm or sickly person; one who is affected by disease or disabled by any infirmity.
Someone who is incapacitated by a chronic illness or injury

Not valid; of no force, weight, or cogency; weak.
In law, having no validity or binding force; wanting efficacy; null; void: as, an invalid contract or agreement.
Deficient in health; infirm; weak; sick.
To affect with disease; render an invalid: chiefly in the past participle.
To register as an invalid; enroll on the list of invalids in the military or naval service; give leave of absence from duty on account of ill health.
To cause one's self to be registered as an invalid.

Disable, Sophistic, Sophistical, False, Spurious, Void, Uncollectible, Specious, Fallacious, Nugatory, Expired, Unsound, Nullified, Invalidated, Null

Disable, Sophistic, Sophistical, False, Spurious, Void, Uncollectible, Specious, Fallacious, Nugatory, Expired, Unsound, Nullified, Invalidated, Null

Agreement is unenforceable or invalid shall not render any other provision of this Agreement unenforceable or invalid.
Use the Ignore Fields with Invalid Types property to replace data of invalid data types with default values.
Short error: Invalid Task Attribute Map Id or Invalid Task Attribute Value.
If any part of the regulations promulgated is declared invalid, all parts that are severable from the invalid parts shall remain in effect.
Once a thirdparty buys without actual knowledge of the invalid lien, that transaction will not be undone notwithstanding the invalid lien.
Directory does not automatically clean up invalid objects, but invalid objects and attributes appear in searches and can be deactivated manually.
Invalid Arrest Warrant: a criminal case WILL NOT be dismissed on the basis of an invalid arrest warrant.
Error Message: Invalid Warehouse or Warehouse Not Available You have entered an invalid warehouse.
If you enter an invalid path or name, a message appears indicating that the output MSI file name is invalid.
Will is invalid if the condition imposed is invalid or contrary to law.

Contractor and their partners from accruing uncollectible debts.
Receivable balances are written off when deemed uncollectible.
And like, you called them uncollectible amounts before.
Bad debts are uncollectible amounts from customer accounts.
Castle Company provides estimates for its uncollectible accounts.
Uncollectible trade receivable balances are written off against the allowance for doubtful accounts when it is determined that the trade receivable balance is uncollectible.
The expense related to uncollectible accounts recognized in the period in which a specific account is determined to be uncollectible.
An allowance for uncollectible accounts is recorded for accounts not yet writtenoff that are expected to become uncollectible in future period.
The amounts deemed to be uncollectible are charged to an expense account for uncollectible accounts.
All categories of estimated uncollectible amounts are summed to get a total estimated uncollectible balance.