1) Instrument 2) Legal document 3) Legal instrument 4) Official document 5) Release 6) The act of acquitting 
• (n.) The clearing off of debt or obligation; a release or discharge from debt or other liability. • (n.) A writing which is evidence of a discharge; a receipt in full, which bars a further demand. • (v. t.) To acquit.
Ac·quit'tance noun [ Old French aquitance , from aquiter . See Acquit .] 1. The clearing off of debt or obligation; a release or discharge from debt or other liability. 2. A writing which is evidence of a discharge; a receipt in full, which bars a further demand. ...
[n] - a legal document evidencing the discharge of a debt or obligation
noun a legal document evidencing the discharge of a debt or obligation
the act of acquitting. · the discharge of a debt or obligation. · a document or receipt as evidence of the discharge of a debt or obligation.