The AMMK has lodged a complaint with the Guindy police against the TVK, alleging the use of a "forged" support letter to stake claim for government formation, police said on Saturday.According to Guindy police, a petition has been received from AMMK General Secretary T T V Dhinakaran. However, officials confirmed that no First Information Report (FIR) has been registered in the matter as of Saturday morning. The development followed a high-drama midnight visit by Dhinakaran to the office of the Assistant Commissioner of Police, Guindy Range.