I work with a client who has had a complaint where a member of the public claims to have scalded herself on a hot drink.  Their coffee machine was broken so they had to make instant coffee using an urn.  It's understood that the drink is likely to have been around 96°C.

This does sound hot.  But, from speaking with another safety professional, a pub-co they used to work at would serve drinks around this temperature.  Converseley - one of my colleagues used to be a barista in a large coffee chain and his recollection was that the max. temp (for drinks) was around 72.

There is no recommended temperature range (that I can find).  My client has a primary authority agreement - they know of no recommended temp. range either.  And there, of course, needs to be a compromise between quality and safety.

The cup, also, had a disclaimer (which is not as important as making sure the drink is served at a reasonable temperature).

Would anyone, who is working in catering, care to share the temperature range they serve hot drinks at (whether that be from urns, espresso bars, etc.)?

The temperature is determined by the preparation, not the service. If you research ideal temperatures for brewing hot beverage: coffe is 90 - 96 C although some claim that for instant this "burns" the coffee and often add milk first before the hot water, black tea (Chinese style) is 95 - 98 C, white tea is 80 C, milk for white coffe and hot chocolate is 60 - 70 C

Obviously adding warm milk cools hot coffee - latte to 70 C, cappucino to 60 C

That disclaimer on the cup is to remind the drinker not to immediately take large gulps of liquid - even 80 C is too hot to leave the roof of your mouth in tact.

Beware comments like "had to" - a broken coffee machine is actually an opportunity to say sorry a hot drink is not available at this time. Too often people mistakenly undertake actions that in reality should be avoided.

Unlike a barista does your client have all the equipment (in addition to the water urn) to carefully monitor preparation and service temperatures?

Breaking news it is perfectly acceptable to tell a client or customer NO.