IN MD the former owner has a statutory right to challenge within 30 days and deliberate fraud must be proved to overturn after a year. 

Any decent judge would overturn that deposit deduction.

Many tax deed states have allowances for the sale to be overturned if it was held improperly (without proper notice, or if there was a mistake, etc.), so regular title insurance isn't available.

They are quite common in FL Foreclosures....never seen one actually denied/overturned.

@Rob Bergeron any new details about what is being done to overturn this.

@Don EnriqueIf the notification is not done correctly, many states allow the foreclosure to be overturned. 

Something that may have been legal in June could easily be overturned by late September.

Luckily the court overturned some silly Seattle laws like first to apply now, so compliance is easier. 

As it would turn out its implementation was not legal  and it is likely to be overturned.

Assuming the court appointed lawyer does the right due diligence and does a great job; I am sure you seen great jobs by attorneys still get overturned.