There will always be security concerns when you sublease. To avoid safety issues and property damage, make sure to do a full background check on your subtenant. It is important to note, however, that in a sublease, the original tenant is still fully responsible for the entire property. If the subtenant violates the prime or master lease, the original tenant must immediately make amends. In some states, the primary tenant can be spared from damages caused by the subtenant if a waiver between the three parties has been signed. On the other hand, if the subtenant has paid a security deposit, then it shall be used to amend the problem.