TS, you aware that ID is not a professional field , they are not regulated by any professional body. Anyone who completed the ID course & can straight away become an ID designers. The main catch is their work is not regulated.

If you want to avoid being cheated, look for the ID firm that is attached to the architecture firm. Architect practice is regulated by LAM. Don't hire the standalone ID firm without any attachment to the Architecture firm.

You ask the ID firm for the company profile, from the profile, you call up to the architect firm they claimed they are attached to / associated with.