English to Polish Law/Patents Law (general)

jak np. w zdaniach:
The chairman shall represent the Company in front of any third parties and his ***social signature*** shall bind the Company within the limits of the decisions to be adopted by the XXX or by the board of directors, as case may be.
The President has ***social signature*** and legal representation of the Association with other people and judgment.
The Liquidator shall have the ***social signature*** and shall be empowered to represent the Company towards third parties in accordance with the directions of the sole shareholder.