The property is officially transferred from the seller to you at "Closing" or "Funding".
At closing, the ownership of the property is officially transferred from the seller to you. This may involve you, the seller, real estate agents, your attorney, the lender’s attorney, title or escrow firm representatives, clerks, secretaries, and other staff. You can have an attorney represent you if you can't attend the closing meeting, i.e., if you’re out-of-state. Closing can take anywhere from 1-hour to several depending on contingency clauses in the purchase offer, or any escrow accounts needing to be set up.
Most paperwork in closing or settlement is done by attorneys and real estate professionals. You may or may not be involved in some of the closing activities; it depends on who you are working with.
Prior to closing you should have a final inspection, or "walk-through" to insure requested repairs were performed, and items agreed to remain with the house are there such as drapes, lighting fixtures, etc.
In most states the settlement is completed by a title or escrow firm in which you forward all materials and information plus the appropriate cashier's checks so the firm can make the necessary disbursement. Your representative will deliver the check to the seller, and then give the keys to you.