also: わりばん
noun
tally seal; seal across adjacent sheets
A seal stamped across the edges of two or more adjacent sheets of paper to prove they belong together, similar to a 割り印. Used in official documents, contracts, or multi-page records.
See also: 割り印
契約書のページの継ぎ目に割り判を押す。
Stamp a tally seal across the seam of the contract pages.
割り判があると、書類の差し替えを防げる。
A tally seal can prevent replacement of pages in a document.
割り印 is the more common term for a seal stamped across two pages; 割り判 is a less frequent synonym with the same meaning.
Compound of 割り (わり, 'split, divide') and 判 (はん, 'seal, stamp'). The term refers to a seal that 'splits' across pages.