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The greater the division of transfers, the higher the level of anonymity and difficulty to track. I sent less money than required, what happens? Transactions below the minimum limit (0.003 BTC for Complete Anonymity mode, or 0.005 BTC for Complete Anonymity + Precise Payment mode) are considered as donations, it does not make sense to make a transfer of such an amount, and the network fee may be higher than the amount sent.