Frequently Asked Questions - Sales Tax Enforcement What purchase modalities are there on the platform? Electronic auction, closed letter and private negotiation modality. What is the electronic auction modality? Electronic auction is a type of sale that takes place on the internet, where those interested in buying a good submit their proposals, indicating the price they intend to pay for that acquisition, increasing the price that the previous bidder offered. On the designated day and time, the auction ends, and the last person who validly submitted a bid is in the winning position.
