Companies and rural producers who make sales outside of São Paulo face a growing fiscal challenge: the risk of losing ICMS credits due to formal or operational errors. "What we see most in our daily work are producers who assume that the operation with another state works the same way as in SP. But just one wrong code or a missing accreditation can result in the credit being denied. An incorrectly entered credit or an operation without adequate documentation in a sale outside of SP can completely nullify the recovery of the ICMS. This type of loss is invisible, but recurrent," says Altair Heitor, CFO of the tax consultancy Palin & Martins.