Just as at the outset of the contract you depended upon the opinion of referees before taking preliminary decisions, it is reasonable that at the end of a contract you should offer to be a referee to a firm which has produced a good result, given a good service to the client, or whose liaison throughout the work with all the people involved has assured good progress and sound relations.
Many smaller commercial firms depend a great deal upon recommendations from past clients for further business. It is as much your duty to acknowledge a good service at the end of a contract as it was to recommend the firm to the client in the first place. When writing to offer your services as a referee for future enquiries, it is also reasonable to remember that the firm deserves to know which of their employees produced the result on their behalf, together with any comments you may have on the service, and information which would be of importance to running the business, or the way in which a future operation is conducted. Similarly, you should inform a firm if you consider their service to have been bad. As it is highly unlikely that the client, architect, contractor and sub-contractors will meet again on one job, the benefit to others of this local criticism is about the only form of post-mortem open to the building industry.
It is easy to forget, during the client’s move into the premises, that the individuals, who have been working on the building since it was a heap of mud, are being evicted at the very point where they are beginning to be proud of their finishes, and before they even get the opportunity to stand back and admire their work. Acknowledgement of good results by individuals should not be overlooked.