attorney ...

attorney-in-fact and attorney-at-law
do u need a attorney?hope u dont need one..but in case u need one ...
Broadly speaking, an "attorney" is one who acts on behalf of another person in some capacity.
An "attorney-in-fact" is akin to an agent who acts on behalf of another person, typically with respect to business, property, or personal matters.
Such an agent does not have to be licensed to practice law and may not need to have any license at all.

if u still interested, go on reading ...
By contrast an attorney-at-law, or lawyer, is a person trained and licensed by a relevant jurisdiction to practice law: to represent clients in legal matters and to give legal advice.
got some basic ideas? ..ok..go on ..
In the United States, the term attorney, standing alone, generally refers to this meaning rather than "attorney-in-fact".

Once admitted to practice by the highest court of a state (a function sometimes administered by the state's bar association), an American attorney may file legal pleadings and argue cases in any court of that state (federal courts, usually require a separate admission), provide legal advice to clients, and draft important legal documents such as wills, trusts, deeds, and contracts.
In some states, real estate closings may be performed only by attorneys, even though the attorney's role in a closing may involve primarily notarization of documents and disbursement of settlement funds through an escrow account.

Practicing law includes interviewing a client to identify the legal question, analyzing the question, researching relevant law, devising legal solutions to problems, and executing such solutions through specific tasks such as drafting a contract or filing a motion with a court.

Most academic legal training is directed to identifying legal issues, researching facts and law, and arguing both the facts and law in favor of either side in any case.
The term "attorney-in-fact" is mostly seen in the context of someone representing another person's interest in business negotiations or regarding signature pages on documents where the person signing is doing so on the basis of a power of attorney. The term power of attorney generally relates to an attorney-in-fact, not an attorney-at-law. Alternative titles for "power of attorney" type documents in non-U.S. jurisdictions include the French "Pouvoir" and the German "Vollmacht".