Party A completes the transaction transfer procedures with Party B first, and then Party B and Party C complete the transaction transfer procedures.
There is no trade relationship between Party A and Party B. A's house is sold to Party B, and Party A and Party C have not signed any agreement. C should go to B, not A. It is estimated that B made money in the middle, and B should coordinate A and B to handle the transaction procedures. C shouldn't go to A by himself.
If Party B can't let Party A cooperate with Party C to complete the transaction, Party C should hold Party B responsible instead of holding Party A .. B sell the house directly to C, but it is estimated that it is only to save some taxes. Originally, if there was a tacit understanding between Party B and Party C, Party B could not mention the sale of the house to Party C and persuade both parties to complete the transaction formalities with more reasonable reasons. But now that Party A knows about it, he must be very sad. Even if Party B has paid all the house payment to Party A, Party A will take advantage of the present situation of Party B and Party C to gain more benefits. This is also due to human nature.
Litigation is not necessarily the best solution. C's ultimate goal is to want a house or to pay compensation?
If c wants a house, I suggest you: talk to b and let b coordinate a to handle the transaction procedures.
If C wants compensation, I suggest you: first study the sales contract between B and C, and look at the default clauses and compensation clauses agreed in the contract. If the liability for breach of contract is clearly defined in the contract and the compensation agreement is clear, collect relevant evidence first, and then claim compensation from Party B as agreed. If the agreement is not clear, C will think twice.
Special reminder to C: A already knows the real estate license or his name, and if he has bad intentions, he will be in trouble. If the liability for breach of contract and compensation agreement between Party A and Party B are unclear or restrictive, that is to say, if Party A can find the evidence of Party B's breach of contract to terminate the contract, Party A can completely dispose of the house (Party A's real estate license is completely useless in the hands of Party B or Party C, and Party A can report the loss and reissue it at any time, but Party B and Party C cannot go through any formalities). And c can only let b be responsible. Assuming that Party C and Party B have paid most or even all of the house payment, and Party B has transferred this part of the funds, even if Party C can win the case and ask Party B to compensate and return the house payment, but Party B is unable to bear the responsibility, Party C will be very passive.
Therefore, Party C had better find a local real estate lawyer, look at all the documents and materials in your hand, analyze your situation and discuss specific solutions (because you don't have any contracts and materials about Party A and Party B, you can't give you more specific suggestions).