Certain defects cured as to acknowledgments and witnesses.

All deeds, conveyances, bills of sale, mortgages or other transfers of real or personal property within the limits of this state, heretofore or hereafter made and received bona fide and upon good consideration by any corporation, and acknowledged for record before some officer, stockholder or other person interested in the corporation, grantee, or mortgagee as a notary public or other officer authorized to take acknowledgments of instruments for record within this state, shall be held, deemed and taken as valid as if acknowledged by the proper notary public or other officer authorized to take acknowledgments of instruments for record in this state not so interested in said corporation, grantee or mortgagee; and said instrument whenever recorded shall be deemed notice to all persons; provided, however, that this section shall not apply to any instrument heretofore made, the validity of which shall be contested by suit commenced within 1 year of the effective date of this law.