advice, advise

1. Advice is a noun ('an opinion given about future action') and advise a verb ('to give advice to'), in both British English and American English:

The hardest thing is knowing where to go to get help, to get the advice and information you need—The Face, 1990

It may make sense to take professional advice on the wording of an appropriate letter—M. Edwards, 1991

We're advising all our clients to sit tight, at the moment, and neither to buy nor to sell—A. Davidson, 1989

I would advise anyone thinking of a relationship with her now to stay well clear—Daily Record, 2007.

2. Both words are used in a special sense in commercial and related uses: advice here is countable and is used to mean 'piece of information' (usually in the plural) or 'a document giving information'

(Now we're looking to encourage our customers to send remittance advices electronically—Accountancy, 1993)

, and advise means 'to notify, to give information to', typically followed by of or a that-clause

(The student will be advised of the name and address of the tutor—Tutors' Handbook 1991

She has advised us that a letter is in the process of being submitted—Northern Echo, 2007).

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