Yes, Honesty is the best policy. Mold assessment is the process of identifying the location and extent of the mold hazard in a structure, and mold remediation is the process of removal and/or cleanup of mold from an indoor environment. Buyers,sellers and mortgage companies are educated on mold assessment and mold remediation, also if a house had a mold issue it will have a paper trail. Keep all records of a mold remediation and take lots of before and after photos if the structure had mold and it was removed.
In the financing, if all the paper work on the remediation is current and the removal was done by professional/certify company. The sellers and buyers are aware of the pre and post condition on the structure this shouldn't be a deal breaker.