Legal Question in Credit and Debt Law in Pennsylvania

Your question really has no useful information in it.

Who are the parties to the agreement? What are their roles? Like borrower/lender? Seller/buyer?

Ok - so we have a verbal agreement. For what? What were the terms of the agreement?

Sounds like there has been part performance of the agreement since property (land? something else? money?) was paid out. If land, the contract has to be in writng to be enforceable.

Your question though is nonsense. You cannot just undo things. Do you have a reason to undo them? Has the other party failed to perform under the agreement in some way?

You ask for a particular remedy - reclaiming property. That may or may not be the appropriate remedy. There are in general 3 types of forms of relief one could seek for a breach of contract: (1) specific enforcement (like in the case of land or some other very unique thing); (2) restitution/status quo - undoing whatever was done and returning the parties to square one as if no contract ever existed; and (3) the usual compensatory - make me whole - give me the benefit I bargained for kind of damages.

Without more details, I don't know what is right for your case or why you want to reclaim property. Try either reposting your query with more relevant details (and this is not a debt collection question unless someone owes you money for something) so you need to direct this to a general contract/consumer lawyer. Or you can get your information together and pay to consult an attorney about your situation.