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FAQs Onboarding process

Identify and Resolve Issues During the Comply Registration Process

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Written by Comply Help Center

I want to configure my store for the Immediate Supply of Information (SII). How do I do it? (Step 0)

To configure the SII, you must do so during Step 0 of the registration process (Tax Compliance System and Tax Regime). In the Invoicing Computer Systems Regulation section, select:

Spain Territory >Not subject to any of the conditions set out in Articles 1.3, 3.3, and 5 of the Regulation > Subject to SII


My store is located in the Canary Islands, Ceuta, or Melilla. How should I configure Comply and taxes in Shopify? (Step 0)

If your business is located in the Canary Islands, Ceuta, or Melilla, you must not only configure taxes correctly in Comply, but also ensure that taxes are already properly configured in Shopify, according to the applicable tax regime.

To configure taxes in Comply, this must be done during Step 0 of the registration process (Tax Compliance System and Tax Regime).

In the Applicable Tax section, select:

  • IGIC for the Canary Islands

  • IPSI for Ceuta and Melilla

Additionally, you must configure taxes in Shopify, as Shopify is responsible for calculating and applying taxes to sales during checkout. Tax configuration in Shopify is managed entirely within the Shopify platform.

Comply’s role is limited to generating the corresponding invoices for all POS transactions and, in certain cases, submitting them to the public tax authorities for proper filing (e.g. Verifactu).


I am a company representative but I have a NIE. How should I configure it?

If, in Step 0, you selected Verifactu under the Invoicing Computer Systems Regulation, and in Step 1 you registered a business, you may complete your details as the legal representative of the business using either a NIF or a NIE.

This information will be used to digitally sign the modelo de otorgamiento. iregardless of the type of identification document provided.


I am having issues validating the signed representation document. What should I do?

If, in Step 0, you selected Verifactu under the Invoicing Computer Systems Regulation, you are required to sign the modelo de otorgamiento so that Comply can submit all generated invoices to the Spanish Tax Agency (AEAT).

If, in Step 3 of the Verifactu setup, you experience issues validating the signed document, Comply may reject the file due to one of the following reasons:

  1. You are registering a company / legal entity, but the document has been signed with a natural person’s digital certificate instead of a legal entity certificate (as company representative).

  1. You are registering as a sole trader (self-employed), but the document has been signed with a legal entity digital certificate instead of a natural person’s certificate.

  2. The uploaded document contains a digital signature that does not match the information provided in previous steps. Please verify that the data entered matches the data associated with the digital certificate.

  3. The document does not contain a qualified digital signature and has instead been signed using Adobe Reader, Acrobat, or another PDF editor by drawing or inserting a handwritten mark. This type of signature is not legally valid for this procedure.

If you have reviewed all these points and the issue persists, you may share the signed document with our Support Teamdirectly from the same screen in the registration process (indicated by a blue arrow).


I place the test order and Comply does not detect it. Am I missing a step?

If you've reached the final step of the Comply registration process, placing a test order from Shopify POS, and Comply doesn't detect the order or returns an error, one of these is likely the cause.

Check that the Comply button is visible in Shopify POS

If it isn't visible:

  1. Go to Sales channels > Point of Sale > Settings.

  2. Go to POS apps.

  3. Go to Apps.

  4. Activate Comply POS UI Assistant.

  5. Save your settings.

Check the order total

The order total needs to be greater than €0.

Check your tax configuration

If the issue persists, please open a support ticket via our in-app chat.

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