["I didn't pay my rent this month because I have some financial problems. The landlord have put a paper on a wall of the building notifying my neighbors that I didn't pay my rent."]
Yikes, that's really cruel of him to do that. I'm sure you're trying the best you can
I didn't pay my rent this month because I have some financial problems. The landlord have put a paper on a wall of the building notifying my neighbors that I didn't pay my rent.