SUBTENANT not paying Have a clear short term signed agreement

[Sam E.]

Hi I lease a home and have for the past two years There is no restrictions to sub leasing in my lease I pay rent to owner pay DWP GAS WIFI I was going out of town and 

sub leased to someone for 2 months The first month went fine the second month 

their check was returned insufficent funds They will not replace check or leave 

I intend to serve a 3 day notice to pay or quit and then follow thru with a UD 

Because I am a tenant and they are a sub tenant I wanted to make sure I have the 

legal standing to file a UD - Again I have a clear written short term lease signed by the sub-leaser