Google play store update not receiving for alpha or beta tester

If your testers are not receiving the update option for alpha or beta testing, try the following

• Make sure you followed Google’s instruction correctly. That is, a) Create google group b) Add the tester to the group c) Make sure tester accepts to be a tester
• If your tester has several Google accounts in his/her phone, then either add all these accounts as testers or remove non tester accounts from the phone. ‘Application already exists’ notification error shows up if you have any non testing Google account in the device. It is just best to have only one Google account in the device which is the testing account.