Monitor the changes of Ship to address in Sales Order

Hi,

My client has an requirment which they would like to monitor whether the ship-to-address has been modified after the order were save.

e.g.

Sold-to 12345

Ship-to 12356

SAVE the order

After the order are sale and sometime later, the user went in VA02 and update the ship-to-address to 23456

now

sold-to 12345

ship-to 23456

It there anyway we can have a report to check if the ship-to has been changes?

thanks,

Rebella