sponsion
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sponsion
(ˈspɒnʃən)n
1. the act or process of becoming surety; sponsorship
2. (Law) (often plural) international law an unauthorized agreement made by a public officer, esp an admiral or general in time of war, requiring ratification by the government of the state concerned
3. any act or promise, esp one made on behalf of someone else
[C17: from Latin sponsiō, from spondēre to pledge]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014