undercollection

noun4

1. •
   Insufficient collection.
2. •
   Insufficient collection of taxes, necessitating administration of corrective billing.
3. •
   Insufficient collection of premiums for insurance, necessitating administration of corrective billing or future rate increases.
4. •
   Insufficient collection of specimens, such as accidental collection of less than 24 hours' worth of urine for a 24-hour urine test.