It follows an investigation into the matter in February the coalition of European Union data-protection authorities led by France's Commission Nationale de l'Informatique (CNIL).
US-based lawyer Bradley Shears was quoted by the Guardian as saying that CNIL is anticipated to rectify that Google violated EU privacy law, and to necessitate it to undo the changes.
"Since Google had the technical capability to combine the data of all of its users' accounts it should have the ability to reinstate the previous barriers that acted like a digital Chinese wall between its services that better protected user privacy," Shears said.
"Since Google refused to heed the EU's prior warnings that changing its privacy policies may violate data protection laws it would not surprise me if restrictions are placed on how Google may utilise the user data profiles it has created since the new policies went into effect.
"This [EU] decision may restrict Google's ability to fully monetise its users' personal data across its platforms and may cost Google tens of millions of dollars in lost revenue."
The alterations that were tracked in January and then carried out in March 2012 involved Google's combining of "silos" of data gathered from services including its search service, YouTube and Maps.
Google however maintains that the policy is in compliance with the EU laws.