Deeds are state law, and the site of that law is the county. There is no federal statute defining a deed or setting out what one must contain. Each state supplies its own requirements, and while the common elements are familiar everywhere, the details that void a deed are local: who must sign, whether a notary or witnesses are required, what description of the land is sufficient, and what the recording office will accept. A deed prepared from a template found online is a genuine risk for exactly this reason, because the template cannot know which state's formalities it needs to satisfy.
Delivery is the step people skip. A deed signed and left in a drawer has generally not transferred anything. The conveyance takes effect on delivery to the grantee and acceptance by them, which is why a deed prepared in advance and held until death is a standing source of litigation among heirs. Recording is a separate act again. Recording is not what makes the transfer good between grantor and grantee, but it is what makes the transfer known to the world, and in a contest between two people claiming the same land, who recorded and when usually decides it. The title search that precedes a closing is a search of these recorded instruments.
The deed and the loan are changed by different acts, and this is where real money is lost. Paying a mortgage off in full extinguishes the debt and clears the lien, but it does not alter the deed, because the deed never mentioned the debt. Running the point the other way is the version that actually hurts people. In a divorce, one spouse commonly signs a deed transferring their interest in the house to the other, and both parties then believe the house has been dealt with. It has not. The signer is still a borrower on the note they signed, still liable for every payment, and still exposed to a foreclosure and a credit file entry if the other spouse stops paying. A property settlement between two spouses cannot bind a lender that was not party to it. The only routes off the note are a refinance in the remaining owner's name alone, an assumption the lender approves with a written release, or paying the loan off.
Deed types describe the promise, not the size of the interest. The family of named deeds, including warranty deeds, special or limited warranty deeds, quitclaim deeds and the various transfer-on-death deed forms, differ chiefly in what the grantor guarantees about the state of the title, and in one case in when the transfer takes effect. A deed with the strongest covenants promises that the grantor owns what they are conveying and will defend the grantee against claims arising at any point in the property's history. A quitclaim promises nothing at all about the title and simply hands over whatever interest the grantor happens to have, which may be everything or nothing. Both can transfer complete ownership; they allocate the risk of a defect differently. That difference is also why a lender in a purchase transaction will not accept the weakest form, and why a transfer between family members frequently uses it.