Shares that were not fully paid up at the time of issue can of course be transferred. But who is held liable for calls on these shares: the transferor or the transferee? The (old) Belgian Company Code included complex regulations for public limited companies (‘NV’ / ‘SA’): both the transferor and the transferee could be held liable up to the amount of the unpaid portion for the payment of company debts incurred before the transfer became effective, i.e. before registration in the share register if the claim is made by the company, or before publication of the list of shareholders…