search the name of the company in google 
write the update on the excel sheet 
u

search the name of the company in google 
write the update on the excel sheet 
update contact information (email , phone , website ,…)
make the old or wrong contact infromation red or write “wrong info” next to them 
find the buyers name if possible 
these information are confidential. i will add the excel spreadsheet when i hier you .