There are many impractical things in GDPR, like this paradoxon: if a customer wants his data deleted, you need to delete all (beside legal necessary like invoices). You cant keep a minimal data for a suppression list. So your employees cant know that this person was deleted and might contact again.
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Sure, you can send it formless. However better you have a process in place.
I'd encourage you to do your research before you just say things. Ideology doesn't always help. Sorry that I broke the news to you, that GDPR was lobbied by big tech.