[Grammar] ‘by request’ vs ‘on request’

[northpath]

What’s the difference between phrases ‘by request’ and ‘on request’?
For instance:
Further details will be sent on request.
There were no flowers at the funeral, by request.

 

[Charlie Bernstein]

What’s the difference between phrases ‘by request’ and ‘on request’?
For instance:
Further details will be sent on request. On (or upon) the moment you request it, someone will send details.
There were no flowers at the funeral, by request. Please don't bring flowers. This has been requested by the family.

- Details will be sent if you request them.

- The family requests that you don't bring flowers.

Does that help?

 

[northpath]

Yes, please put another example with the phrase ‘by request’.

 

[Charlie Bernstein]

By request of the hotel management, we will leave our dirty towels on the bathroom floor for the chambermaid to remove.