How to register your DIAN numbering resolution

Watch the video2:19

The numbering resolution is the DIAN’s permission for you to number your invoices. It defines a prefix, a range of numbers and a validity period. Without one you cannot issue anything.

Almost every field on this screen comes from the resolution the DIAN gave you. The technical key is the exception: it comes in no document at all. You generate it yourself in the DIAN portal, under Generación de Clave Técnica.

The test set uses its own numbering

Before you can issue for real, the DIAN requires a test set. That set does NOT use your numbering: it goes out on a test range the DIAN generates separately, and our technology provider transmits it for you from the TestSetID.

Only once the DIAN accepts the set do you start issuing on your real numbering.

⚠️ Your resolution still works. It is simply that, until the set is accepted, what reaches the DIAN is test documents — not invoices.

Before you start

• You must have completed enablement — see How to get enabled with the DIAN.
• Have the resolution PDF in front of you.

The fast way: fetch it from the DIAN

Press Traer resolución de la DIAN and we fill the form for you: number, prefix, range, validity and technical key, read from the DIAN’s own record.

This is the recommended route. Nobody retypes the 40 characters, so there is no way to mis-copy them.

• If the DIAN reports several resolutions, choose which one you will use.
• If the button tells you the lookup is unavailable, fill the fields by hand or upload the PDF. The rest of this guide is unchanged.

The fields, one by one

Document type : What this resolution covers: sales invoice (the everyday one), credit note (to void or correct an accepted invoice), or debit note (to charge an additional amount). Register one resolution per type you will issue.

Resolution number : The number the DIAN assigns, no spaces. Example: 18764000001.

Resolution date : The date the DIAN issued it.

Prefix : The letters in front of each invoice number. Example: FE, SETP. Copy it exactly, including capitals. It must be the same prefix you associated with your technology provider in the DIAN portal.

Range from and Range to : The first and last number the DIAN authorized — e.g. 990000000 to 995000000. DeusRex assigns consecutives inside that range, in order and without gaps.

Valid from and Valid to : The resolution’s validity period. Outside those dates the DIAN rejects every invoice issued under it.

Form 1876 does not print the end date: box 38. Vigencia carries a number of months — the DIAN authorizes 6, 12, 18 or 24 depending on your profile — counted from the formalization date. Pick the period and we compute the end date for you.

Technical key : A 40-character code the DIAN ties to your resolution. Example: fc8eac422eba16e22ffd8c6f94b3f40a6e38162c. It is required: the DIAN uses it to verify each invoice is authentic, so a single mistyped character rejects all of them. Copy it whole, with no spaces.

It does not appear on form 1876. It is generated in the DIAN portal, under Generación de Clave Técnica — see How to get enabled with the DIAN.

⚠️ Generating a new key invalidates the previous one. Update it here the same day or your invoices will be rejected.

Important warnings

Watch both the expiry date and the range. When either runs out you cannot invoice until the DIAN issues a new resolution. Request it weeks ahead.

Do not edit the prefix or the range of a resolution that has already issued invoices. Create a new resolution instead. Changing them leaves your numbering inconsistent with the DIAN’s records.

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