Real Housewives of Atlanta alum Kim Zolciak and estranged husband Kroy Biermann have reportedly been put on notice that their Georgia mansion is heading for foreclosure, RadarOnline.com has learned. The home’s lender informed the estranged couple that they plan to move forward with foreclosure unless Kim and Kroy head back to court over their unpaid mortgage. Court documents obtained by TMZ revealed Truist Bank attorneys informed Kim and Kroy that they planned to take back ownership of the home, which was heavily featured on the hit Bravo show. Documents stated the bank intends to initiate non…