Answer:

invoices

Answer	Crossword Clue
INVOICES	Bills
INVOICES	"Pay me!" papers
INVOICES	Bills to pay

INVOICES	Shipper's slips
INVOICES	Itemized bills
INVOICES	They should be paid

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.