Our lease has been up for nearly a year...
attempts at new lease terms have been unsuccessful mainly because the management keeps changing hands. So we are just month to month while waiting for someone to contact us. We looked at some new spaces but don't want to move unless we have to. However, each month I have to email the account manager and ask for an invoice to pay rent. ONCE back in February, I mailed the rent check without an invoice number and they cashed it a few days later but did not apply it to our account. It took them two months to report that we had not paid rent. (The bookkeeper is outsourced and not part of the management company). When I sent a copy of the cleared check, it took them another month to verify that we actually did pay rent. WHERE did they apply the money in the first place?
Anyway, I am getting annoyed at having to ask for an invoice. They used to send one about the 20th of each month and I could pay it well before the first of the month. Now it just feels like I am begging. If we are ever contacted by the latest management team, I can complain but meanwhile...
vent. 
= new reply since forum marked as read
In the plaza where my business is, the landlords/mgmt co blew off one of the tenants when their lease was up. They were month-to-month for about 6 months and kept trying to get a new lease to no avail.
Then out of nowhere, right before 4th of July weekend, they were told they had to leave. Turns out they had ALREADY GOTTEN A NEW TENANT TO SIGN A LEASE before even telling the existing tenant. SO fucked. The whole neighborhood was in an uproar because it was a beloved, unique ethnic market. But it was too late.
You may want to get a lawyer involved, if you can do so at a reasonable cost. Or if you can go over the management company's heads and straight to the owners, that may help. But if they're already considering kicking you out, none of that will help. I don't know. It sucks to be at the mercy of landlords...