However, because a corporation is not a real, or natural, person, someone must sign on the corporation's behalf. A stockholder does not have the automatic right to sign a corporation's contracts. The corporation must legally authorize the stockholder to sign on its behalf.
A miscarriage can be a common cause of brown to black vaginal bleeding. Not all the women realize that they are pregnant until there is an abnormally heavy bleed particularly consisting of large clots or the color varying from the normal period blood.
There is also a chance that your black period blood is caused by an infection or STD. Uterus infections can cause blackening as well as many STDs. Women that have sex during their cycle also experience black bleeding because the blood was pushed back into the vagina and can become trapped as a result.