Sheikh `Abd al-`Azîz al-Râjihî
When a person or company is hired to move furniture or other property, that party assumes a trust. The ruling of one who assumes a trust is that if he engages in any act of misconduct or negligence then he is liable to compensate for any injury or loss that is incurred on account of it.
Misconduct is where the person does something that he is not supposed to do while assuming the trust in question. Negligence is where the person fails to do what he is obliged to do while assuming the trust.
Therefore, if the movers do something they are not supposed to do or fail to do what they are supposed to do to with regard to the safeguarding and transporting of the property, then they are liable for he damage that results.
If damage occurs without it being on account of their misconduct or negligence, then they are not liable for it.
And Allah knows best.
Source: Islam Today