You may submit any BLS certification. Here are three online options.
1. This one is $50 with NewLife or for $50 you can also use ProCPR who have a lot of videos for training.
2. First one is with Redcross and they have in person and hybid classes
3. National Academy and National Foundation both do does their course for $15 and you can practice and study for free anytime you need a refresher.