More bad news for Tameka Raymond ... first Usher made it clear he's gonna evict her from his mansion ... now TMZ has learned her OTHER landlord -- from a small business she owns -- is suing her for $50k in unpaid rent and other stuff.
Antelope Valley Plaza filed the eviction case against Tameka -- claiming she signed a two-year lease agreement back in 2010 for three retail spaces in a Georgia complex ... where she runs Kangazoom -- an indoor play center for kids.
AVP claims in the docs Tameka was supposed to pony up $9,966.67 / month ... but she hasn't anted up for months -- and now owes $36,943.42 in back rent.
But wait ... there's more. AVP claims she owes more than $4k in late charges, $2k in unpaid taxes all tolled, AVP is gunning for $49,816.18.
Tameka says AVP is the one that breached the contract, and she wants the case dismissed.