Identifier exists [identifier_exists]

Use the identifier exists [identifier_exists] attribute to indicate that unique product identifiers (UPIs) aren't available for your product. Unique product identifiers are submitted using the GTIN [gtin], MPN [mpn] and brand[brand] attributes.

When to use

Use for products that don't have a GTIN, MPN or brand.

Use the following set of rules to provide the correct identifiers for each of your products

Product identifier requirements

Regardless of category

The GTIN [gtin] attribute is required if the product is widely manufactured and has a GTIN.



Required product identifiers based on category

Requires a value for the brand [brand] attribute


If product identifier requirements are not met, then your product's performance may be limited.

Products that might not have unique product identifiers include:

  • Custom goods or one-of-a-kind products, like custom T-shirts, art or handmade goods
  • Products produced before GTINs were introduced, like vintage products, antiques, books published before 1970 and other special products

There are four supported values for this attribute:

yes / true
no / false


Follow these formatting guidelines to make sure that Google understands the data that you're submitting.

For details on when and how to submit values in English, learn more about submitting your product data.



Supported values
(Text and XML feeds)
yes, true, no, false

Supported values 
(Content API feeds)

true, false
Repeated field No
File format Example entry


XML feeds <g:identifier_exists>no</g:identifier_exists>

To format your data for Content API, have a look at the Content API for Shopping.


Follow these guidelines to make sure that you submit high quality data for your products.

  • Ensure that you only set the value to no [no] or false [false] for this attribute if you are certain that your product doesn't have any assigned unique product identifiers. (Note that the value must be submitted in English).
  • Products for which the identifier exists [identifier_exists] attribute is incorrectly set to no [no] or false [false] and for which there is evidence that a unique product identifier exists, will be disapproved. (Note that the value must be submitted in English).


Products without GTINs, MPNs and brands

An illustration of a woman wearing a black dress

Product data for a new customised black dress, size medium, 32.00 USD



Title [title]

Customised black dress

Price [price]

32 USD

Colour [color]


Size [size]


Identifier exists [identifier_exists]


Condition [condition]


Bundle [is_bundle]

yes [yes]

GTIN [gtin]

(Leave blank, as the dress is custom made and doesn't have a GTIN)

MPN [mpn]

(Leave blank, as the dress is custom made and doesn't have an MPN)

An illustration of a scarf that

Product data for a new, hand-knitted, orange and black polka dot wool scarf, 15.00 USD



Title [title]

Hand-knitted polka-dot wool scarf – orange/black

Price [price]

15 USD

Colour [color]


Identifier exists [identifier_exists] no

Condition [condition]


GTIN [gtin]

(Leave blank, since the scarf is custom made and doesn't have a GTIN)

MPN [mpn]

(Leave blank, as the scarf is custom made and doesn't have an MPN)

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