When you Enter your Postcode for example, it appears as you have entered it in your Listing and Details views. It is always best for Presentation to use the correct Capital Letter Character type for the Entry as it should appear in a written letter. Some people would consider it sloppy if grammatical style is not adhered to.

Always use Spaces between the Landline Telephone Number as people read a telephone number in sections. Separate with Area Code, Three Characters and (usually) Four characters, (apply the standard format for your location). Mobile Telephone Numbers are Separated into, (normally), Five Characters, followed by Six Characters. It is often wise to split the last Six Characters into two groups of Three with a Space also.

You will have noticed that this FAQ has alot of Capitals for emphasis. This is due to using a PHP scripting, although the script is designed to take these into account, it is preferable to using quotation marks or exclamation marks used in the script and can assist in page load speed.
Although this is is not grammatically good English and is not recommended for literature, it is an internet escape route.