# Fields

<figure><img src="/files/5HEZryJsx8oX6GdoyHEH" alt="" width="563"><figcaption></figcaption></figure>

**A cell with a placeholder will be replaced with the provided value during document generation.**

If the same field (with the same name) is repeated in other parts of the template, we will detect it and fill the document accordingly using the value provided only once.

### Cell Type and Data Type

If you define cell type (e.g. Number, Date...) data type passed in respective field should match cell with placeholder.

> Service can automatically convert numbers (if they are valid Excel numbers) passed as string if type of cell is Number or Currency

### Field Name Rules

Do not use special characters or spaces in field names. This makes it easier to reference them during integrations and allows their use in formulas and other parts of spreadsheets.

> *We recommend using camelCase rules for field naming e.g. **fieldWithMultipleWords**.*


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