Posted By onfilm:
Personally I think your caption is fine - after all if the buyer doesn't know what HSBC means then they wouldn't be searching for it anyway! However iStock seems to think we are also in the education business, so I would add a bit of waffle about the bank, and that should be fine.
One thing contributors should remember is that if a buyer looks for "signs" under editorial rather than "HSBC" they may download it and later find that the business HSBC represents doesn't fit with what they had intended their signs to show. Educating the buyer makes sense and could increase sales. A good thing is that istockphoto has no limits on the length of the description so one can write enough to be clear. One popular microstock site allows only 200 characters and you must include the place name and date twice within that limit.