You can transfer ownership in Google Merchant Center by adding them as an admin user. Remember that if you do so and remove yourself as a user, any website claims you made will be removed and the new owner needs to reclaim the website. This might cause all ads to get disapproved, so make sure you can do the whole change up and website claim at the same time.
Steps to undertake
Go to Google Merchant Center and click on the wrench icon in the top right corner. Then select Account access.
Click on the big blue plus button, a new screen will appear with a form. Enter the user email address.
Check the box next to admin and click on add user.
You can now remove yourself as a user by going to the wrench icon in the top right corner and select Preferences
Simply click on remove access. If the button is greyed out, that means you have not added an admin yet. So make sure to do this first.
thank you for the answer. So what is the solution if we have a merchant center and google ads registered in france and now the company is registered in USA? We need to change business information and credit card on both account but we are afraid of suspension. What can we do ?
The correct steps would be to close down the Google Merchant Center account and open a new one from the right location, ie USA. Make sure you do not use VPNs, meaning you need to be physically located in the US. GMC will not have any credit card info so you may be talking about Google Ads. For Google Ads, best to contact Google support to ask for advice.
You will likely need to close down the account and create a new account with Google Ads.
when you transfer ownership can you change the country of the business information ?
You can not unless next to the country you see a dash, then the address can be changed to a different country, in theory. However, changing the country may trigger a suspension.