捨て印
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て
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Meanings
1
marginal seal; approval seal in the margin
A seal stamped in the margin of a contract or official document in advance, to validate later handwritten corrections or additions without needing a new seal each time.
If you stamp a marginal seal on the contract in advance, it's convenient when you need to make corrections later.
2
using up leftover ink on a seal
The act of pressing a seal onto scrap paper to remove excess ink after inking, so the next impression is clean. Less common than the marginal seal sense.
I put too much ink on the seal, so I blotted it on scrap paper before stamping the document.