What are the salient differences between SIM and DPM??

[tommls]

Which one is more appropriate for accepting donations on a website and being SAQ-A compliant vs. SAQ-C compliant??

Does SIM work with ARB?? Authnet support says DPM doesn't work with ARB.

The API comparison isn't sufficiently detailed...

Thank you, Tom

[Trevor]

DPM is essentially an extension of SIM, they have largely the same functionality and limitations.  It is not possible to directly generate a subscription using SIM.

[tommls]

If I program a form to accept donations through DPM, where do we retrieve the donor's information so we can thank them etc.??

I understand we'd only be able to do one-time donations with DPM.

What's the best way to set up things so we know the donor's information like name, email, etc.??

Thank you, Tom

[Trevor]

The DPM process is designed to post the results of the transaction back to your site so that you can generate the appropriate receipt page.