Bill vs. invoice?

[FrankU]

Hi, please tell me the difference between bill and invoice. In my opinion, bill as more colloquial term and invoice is more formal? Also, bill can have other meanings such as banknote and or proposed law but I guess there is more to that question?
Thank you in advance.
Frank
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[Mister Micawber]

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I think that you have covered the distinction quite well, Frank. Where they have the same meaning of a record of amount owing, an invoice is a formal document in a sales transaction, and is a business term. Bill is used in conversation, and is what we normally receive from our waiter or dentist.
.
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Native English teacher at Mister Micawber's

[Varul]

Generally Both the Bill and Invoice is same in meaning

Bill:
an itemized statement of money given for goods or services rendered.
For example He paid his bill and Left.

Invoice:
An invoice or bill is a commercial document issued by a seller to the buyer, indicating the products, quantities, and agreed prices for products or services the seller has provided the buyer. An invoice indicates the buyer must pay the seller, according to the payment terms.

For more details regarding accounting and its terms numia.biz/video_tutorial/index.php

[John09]

An invoice is a commercialized document issued by a marketer to a vendee, indicating the products, quantities and agreed prices for products or services that the Merchandiser has already provided the Purchaser with.
A bill is a papers requesting mercantilism for goods previously supplied. This presentation of a banknote is communal drill on the portion of restaurants, attainment roll companies, utilities, and opposite copulate providers.
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Bill Online Payment