This whole line of reasoning is irrelevant. These two made an agreement. Verification violated it. Therefore he has no more rights under that agreement correct?
no, because if the agreement is void the payment has to be given back.
its the same with returning a good you dont like back to store and requesting back your money (at least this works where i live... dont know about other countries)
the only way for the "store" to not repay is if the good is damaged.
No. the agreement was not resolved mutually. Verification VIOLATED the agreement (ie broke the contract) meaning it is void, and he has no protections under it.
"Any kind of contract may be considered broken ("breached") once one party unconditionally refuses to perform under the contract as promised, regardless of when performance is supposed to take place. This unconditional refusal is known as a "repudiation" of a contract.
Once one party to a contract indicates--either through words or actions--that it's not going to perform its contract obligations, the other party can immediately claim a breach of contract (failure to perform under the contract) and seek remedies such as payment. This is sometimes called an anticipatory breach of contract. Read on to learn more about the concepts of repudiation and anticipatory breach of contract. (For more information on disputes involving breach of contract, see Nolo's article Breach of Contract: Material Breach.)"
http://www.nolo.com/legal-encyclopedia/breach-of-contract-anticipatory-breach-32653.html