It can take several days or even weeks to receive the official title certificate. Do not start renovations until you have full legal ownership.
Most platforms require pre-registration, proof of funds, and sometimes a refundable "bid deposit" just to participate. The Bidding Process: buying a house at auction process
Interior access is rarely granted. Conduct a "drive-by" inspection to assess the exterior, neighborhood, and occupancy status (e.g., squatters or previous owners still living there). Financial Setup: It can take several days or even weeks