If you're wondering whether professionnels-sg.e-customerservice.de is a scam, the short answer is that the evidence is so thin it's hard to give it the benefit of the doubt. The domain is a .de address that appears to position itself as a customer service portal, but right now the entire website is just a Cloudflare 520 error page — there's nothing functional behind it.
What's more concerning is what's missing. Under German law, any commercial website operating a .de domain must display an Impressum with the company's full legal name, address, and contact details. This site has none. No privacy policy either. There's no about page, no team, no phone number or email listed. For a site that's meant to provide customer service, that's a glaring red flag.
Most legitimate businesses in Germany make their legal identity easy to find. In contrast, professionnels-sg.e-customerservice.de offers no way to verify who you're dealing with. Combined with the broken site and lack of any online history or reviews, there's no reason to trust this service with your data or time. Until an Impressum appears and the site actually works, steer clear.