PY

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Series administration in electronic documents (DE) of Paraguay.

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A. Series Administration

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1. Initial Sequence:

   1. Use standard numbering (without series) from 0000001 to 9999999 (nine million nine hundred ninety-nine thousand nine hundred ninety-nine) for each document type.

2. Series Start:

   1. When standard numbering is exhausted, activate the use of series.
   2. Define the series with combinations of two uppercase letters (excluding Ñ).
   3. Practical Example: Start with Series AA.

3. Use of Additional Series:

   1. Establish a default series order: AA, AB, AC, ..., AZ, BA, BB, ..., BZ, ..., ZA, ZB, ..., ZZ.
   2. Validate sequentiality according to this order.
   3. Practical Example: After AA, use AB, AC, and so on.

4. Initial Series Date:

   1. When receiving a DE with series, take the digital signature date and time as the initial date of the corresponding series.

5. Series Validation:

   1. Approve DE under the following conditions:

      1. Immediately preceding series: DE with a series prior to the highest series submitted to the system, with a digital signature date prior to the start date of the current series' validity.
      2. Equal series: DE with a series equal to the highest series submitted to the system.
      3. Immediately subsequent series: DE with a series after the highest series submitted to the system, with a digital signature date after the start date of the current series' validity.

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B. Additional Considerations and Controls

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1. Series Integrity: Validate that the assigned series has not been used previously to avoid duplicates.
2. Record of Used Series: Maintain a historical record of all used series for audit and traceability.
3. Standard Numbering Exhaustion Notification: Alert when standard numbering is nearing exhaustion to prepare for the transition to series.
4. Sequentiality Maintenance: Implement controls to ensure correct sequentiality within each assigned series.
5. Audit of Used Series: Conduct periodic audits to ensure continued compliance with regulations and the validity of used series.