Can I return the property without the water card? What should I do?

No, you need to use up the balance in the previous property water card and apply for a new water card in the future. The water card handled by the former property is generally managed by the former property. Even if the water card is returned, it can only be handled by the former property. After the former property left, it is impossible to find a new property to return the card. The only solution is to find a new property to apply for a new water card after the balance of the old water card is used up. Therefore, the water card is gone, and the previous property can not be returned. You need to use up the balance in the previous property water card and find a new property to apply for a new water card.