EPR investigations have been carried out both in the first and second harmonic modes on the organic ferromagnet (NBu4)(2)Mn-2[Cu(opba)](3) With T-c = 22 K. The data was collected in the temperature range 300 - 15 K. At temperatures much higher than T-c (T greater than or equal to 100 K), the spectrum consists of a single line at g = 2.00 exhibiting Curie behaviour. Upon cooling below 100 K, the line shows strong temperature dependent g shift in resonance field to higher value by 50 G at 15 K. This is taken as evidence for the onset of uncompensated antiferromagnetic spin correlations well above T-c Evidence was also obtained for spin fluctuations which got slowed down with lowering of temperature. The correlation time at 15 K is greater that 10(-10) sec.