Often, the customers themselves don't write the letters.

She asks that customers write, instead of call.

One customer wrote that he spent an entire afternoon at the store only to exchange "teasing glances" with her.

In fact, over the years, more customers have written to recommend Galleria than any other restaurant.

Many customers have written or called the Parks Department in protest.

"This is the worst mistake that eBay has made," a customer wrote on the site's message board.

And at least one customer wrote him into a novel.

"The shop is beautiful, beautiful," wrote a customer in Russian.

The customer may write the Reply Paid envelope out by hand.

In practice, however, it makes no difference to restaurants whether customers break down the percentages themselves or write in a total tip.