Be sure to check the nonces in the transactions. While firing transactions rapidly, due to P2P network delays and our load balancing, some of the returned nonce values will be “behind”. To avoid this, manually increment the nonce.
I want to transfer ETH from an address to another address on ropsten network. but I have no idea that how to use it. So please can you help me for this ?
Please review our docs here for the send raw transaction method, https://infura.io/docs/ethereum/json-rpc/eth_sendRawTransaction