The current minimum amount for a UTXO transfer is 0.00000541. However, it's possible that the network will reject transactions with an amount below 0.00000547 (this value is determined by the blockchain and might change). Here are the recommended minimum amounts:
- BTC: 0.00000547
- BHC: 0.00000547
- BSV: 0.00000547
- LTC: 0.00000547
We do not enforce any minimums for ERC-20 transactions, however there might be minimums at the contract level.