Contracts I Promissory Restitution Restatement Second of Contracts § 86 
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	A promise  made in recognition of a benefit previously received by the promisor from the promisee  is binding to the extent necessary to prevent injustice. 
	A promise  is not binding under Subsection (1)
		
			if the promisee  conferred the benefit as a gift or for other reasons the promisor has not been unjustly enriched; or 
			to the extent that its value is disproportionate to the benefit. 
		 
	 
  
					Copyright, The American Law Institute
Must have some reasonable expectation of restitution .
Restitution  must be for a material benefit, not merely a sentimental one.