Thank you for registering. Which one is correct?

[sahanav]

Thank you for registering. or Thank you for your registration - which one is correct?

Also which is the correct preposition to use after registering -

Thank you for registering with XYZ or
Thank you for registering for XYZ

Please help.

Thanks in advance.

 

[Rover_KE]

Thank you for registering. or Thank you for your registration - which one is correct? They are both correct.

Also which is the correct preposition to use after registering -

Thank you for registering with the blood donation service.

Thank you for registering for our new pilates classes.

`

 

[sahanav]

Dear Rover,

You rock. Thanks a lot for your help.

Kind Regards.

 

[emsr2d2]

Thank you for registering. or Thank you for your registration - which one is correct?

Also which is the correct preposition to use after registering -

Thank you for registering with XYZ or
Thank you for registering for XYZ

Please help.

Thanks in advance.

All the examples you posted are grammatically correct and natural. Whether you use "with" or "for" would depend on the context.