Last month of lease, late on rent

[Dilini Peiris]

So this tenant who is always late on rent has come to the end of the lease term. It wnds in a month and they have given notice that they will moving on.  Thank God. Bot....they are late on this last month too.!!! Not sure what to do. Filing eviction doesn't seen worth because they are only hoping to be here for 3 more weeks. But I also fear that they are trying use the deposit for the last month's rent. Any advice ?