(a) Every letter of attorney, containing a power to convey any real estate as agent or attorney for the owner thereof or to execute as agent or attorney for another any deed or instrument in writing, that shall convey any real estate, or whereby any real estate shall be affected in law or equity, shall be acknowledged or proved and certified and recorded with any deed that the agent or attorney shall make in virtue of the letter of attorney.
(b) Letters of attorney shall be proved or acknowledged before the same courts or officers that are authorized by this act to take probate of deeds conveying real estate.