currency strap; banknote band
A paper band used to bundle banknotes, often with the issuing bank's name printed on it.
I saw a bundle of bills with a currency strap at the bank.
mailing wrapper; newspaper wrapper
A paper band or wrapper used to bundle newspapers, magazines, or other mail for delivery.
I put a mailing wrapper on the newspaper and mail it.
Compound of 帯 (obi, 'band') and 封 (fū, 'seal'). The exact historical derivation is uncertain, but the word literally suggests a band used for sealing or bundling.