Is it permissible for a poor, indebted person to take money from the wealthy to meet the needs of his family, without informing them that those in need are his family? And is he obligated to return what he took previously?

It is permissible for an agent entrusted with distributing charity to give it to his needy father and family, provided they are deserving recipients, and the principal did not specify a particular category that excludes the agent's family, and the agent did not favor his family in assessing their eligibility. It is preferable for the agent to provide for his family from his own money if he is able.