Inquiry API - May I please get example use cases for InquiryRequest, IssuerReject-3 and EchoMessage

[MAC]

Please may I request a qualified answer on when I would be using these 3 Request types please?

InquiryRequest, IssuerReject-3 & EchoMessage

[SyedSa]

Hi @MAC, Thank you for reaching out. An agent will get back to you as soon as possible. Until then, if any community member has information that may be helpful, feel free to reply in this thread.