[members-discuss] An ISP offers to announce our prefix. Is that normal?

Hi,

I have a question about the validly of an option provided by our ISP.

Back story: We will move one of your office uplinks in germany next year 
to an other provider. They offered us various options how it could be 
implemented. In my personal option one option sounds technical crazier 
then the other, even that it is "enterprise".

The management involved raised concern when the ISP noticed that if we 
wanna use "just BGP" we will loose any SLA for L3 services. With no 
doubt I see managements point but now it comes:

Then the ISP offered us to announce _our_ prefix for us, from their ASN, 
and here I lost trust, and stopped the planning for now to get either 
confirmation or an other red flag.

- Is this even "allowed" or recommend by RIPE policies or BCPs?
- Wouldn't that be at least looks like a/an BGP hijacking (attempt)?
   Because I have not seen / read about that implementation anywhere...
- Just in case this is ok-ish, how would I setup the ROA with RPKI so 
that it would be come valid?


An other but related question: Regarding the "No SLA" thing:
Could someone point me on how other ISPs handle this or what would be 
"industrial standard". I highly doubt the reasoning, that just because 
the customer is using his own gear that the ISP will get way with any 
disturbance of their service...

Naive me thought that it would be like in your data center 
installations: You get transit v4 and v6 networks from the provider, 
configure BGP and are done. Yes this does not prevent a customer to 
mis-configure things but in this case we would just get a default route 
and announcing one or more prefixes. I hardly see any pitfalls here.

Thanks in advise and for your time,
Best,
Bernd