Description I: Record retraction is used to reverse changes that have been made to existing Record Entries. Once a Record Entry has been retracted, it is no longer visible in standard queries, though it remains accessible in PHR audit records, should evidence ever be required for legal or other exceptional circumstances. Canada Health Infoway provides the following definition for retraction: This mechanism allows an existing record to be "removed" from the PHR if it is deemed erroneous. It can also be used to reverse changes that have been made to an existing record. Once a record has been retracted, it is no longer visible in standard queries, though it remains accessible in PHR audit records should evidence ever be required for legal or other exceptional circumstances. After retracting an erroneous record, a user has the ability to resubmit a corrected record with no visible indication that there was ever a previous version. Retract generally has significant constraints upon its use because of the risks of removing data from a patient's record that might have been used by others in making decisions. The specifics will vary by jurisdiction, and potentially even by type of data. There are times that a PHR Record Entry is created then found to be erroneous, i.e., the record may belong to another individual. In these cases, it is necessary to remove that record from view (storing it in case it may be needed for litigation or investigation purposes, etc.). After retracting an erroneous record, a user has the ability to resubmit a corrected record with no visible indication that there was ever a previous version.