The World Bank and CAF-Development Bank of Latin America could not be immediately reached for comment.
The operation, which would take place in the coming weeks, would guarantee 60% of the issuance, and the notes would have a maximum maturity of five years, said the ministry source, who asked not to be identified.
The intention is to issue two separate bonds, each with its own backing, for up to $600 million each, the source said.
"What (the guarantee) allows is for the interest rate to be set on the qualification of the banks" and not Argentina's, said the source.
The South American economy is also seeking $500 million of fresh financing from the World Bank, the source added, additional to the $2.5 billion the multilateral lender already has already committed for 2023.