# MD for: https://www.mercadopago.com.br/developers/es/docs/checkout-bricks/payment-brick/advanced-features/initialize-data-on-the-bricks.md

\> CLIENT\_SIDE > > h1 > > Initialize data on the Bricks ## Cards In the form displayed for payment by card, you can start with the \*\*document\*\* and \*\*email\*\* fields already filled in. For this, it is necessary to pass the following configuration in the Brick's initialization object. 

* [javascript ](#editor%5F1)
* [react-jsx ](#editor%5F2)
javascript react-jsx 

```
settings = {
  ...,
  initialization: {
  ...,
  payer: {
  ...,
  email: '<PAYER_EMAIL_HERE>',
  identification: {
  type: 'string',
  number: 'string',
  },
  }
  }
}
```

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```
const initialization = {
 ...,
 payer: {
  ...,
  email: '<PAYER_EMAIL_HERE>',
  identification: {
  type: 'string',
  number: 'string',
  },
 },
};
```

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\## Pix In the form displayed for payment by Pix, you can start with the \*\*email\*\* field already filled in. For this, it is necessary to pass the following configuration in the Brick's initialization object. 

* [javascript ](#editor%5F3)
* [react-jsx ](#editor%5F4)
javascript react-jsx 

```
settings = {
  ...,
  initialization: {
  ...,
  payer: {
  email: '<PAYER_EMAIL_HERE>'
  }
}
```

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```
const initialization = {
 ...,
 payer: {
  ...,
  email: '<PAYER_EMAIL_HERE>',
 },
};
```

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\## Other payment methods In the form displayed for payment by \*\*boleto bancário\*\* and \*\*payment in lottery\*\*, you can start with the fields already filled in. For this, it is necessary to pass the following configuration in the Brick's initialization object. 

* [javascript ](#editor%5F5)
* [react-jsx ](#editor%5F6)
javascript react-jsx 

```
settings = {
  ...,
  initialization: {
 ...,
 payer: {
  firstName: '<PAYER_FIRST_NAME_HERE>',
  lastName: '<PAYER_LAST_NAME_HERE>',
  identification: {
  "type": "<PAYER_DOC_TYPE_HERE>",
  "number": "<PAYER_DOC_NUMBER_HERE>",
  },
  email: '<PAYER_EMAIL_HERE>',
  address: {
  zipCode: '<PAYER_ZIP_CODE_HERE>',
  federalUnit: '<PAYER_FED_UNIT_HERE>',
  city: '<PAYER_CITY_HERE>',
  neighborhood: '<PAYER_NEIGHBORHOOD_HERE>',
  streetName: '<PAYER_STREET_NAME_HERE>',
  streetNumber: '<PAYER_STREET_NUMBER_HERE>',
  complement: '<PAYER_COMPLEMENT_HERE>',
  }
 }
}
```

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```
const initialization = {
 ...,
 payer: {
  firstName: '<PAYER_FIRST_NAME_HERE>',
  lastName: '<PAYER_LAST_NAME_HERE>',
  identification: {
  "type": "<PAYER_DOC_TYPE_HERE>",
  "number": "<PAYER_DOC_NUMBER_HERE>",
  },
  email: '<PAYER_EMAIL_HERE>',
  address: {
  zipCode: '<PAYER_ZIP_CODE_HERE>',
  federalUnit: '<PAYER_FED_UNIT_HERE>',
  city: '<PAYER_CITY_HERE>',
  neighborhood: '<PAYER_NEIGHBORHOOD_HERE>',
  streetName: '<PAYER_STREET_NAME_HERE>',
  streetNumber: '<PAYER_STREET_NUMBER_HERE>',
  complement: '<PAYER_COMPLEMENT_HERE>',
  }
 },
};
```

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