# Automated Recurring Invoicing in ood.bg: Steps, Features and Limitations

Source: https://ood.bg/en/blog/automated-recurring-invoicing-oodbg
Published: 2026-11-01 · Updated: 2026-11-01

## TL;DR
- ood.bg automates the creation and sending of recurring invoices for Bulgarian companies.
- Flexible scheduling and secure email delivery are available.
- Limits apply only to the number of emails per month, depending on your subscription plan.

## Key facts
- **Document recurrence options:** Every N days, weeks, months, years, or on the last day of the month
- **Invoice numbering:** 10-digit sequential numbers as required by Bulgarian VAT law
- **Plan limits:** Start: 500, Business: 3,000, Pro: 15,000 emails per month

Automating recurring invoicing with ood.bg helps international and Bulgarian SMEs save time and reduce manual errors when billing clients regularly. The setup is straightforward and allows automatic, secure delivery of documents to clients, with full traceability.

## What is automated recurring invoicing in ood.bg?

ood.bg provides a feature for automatically generating recurring documents—such as invoices, proforma invoices, and notifications—on a set schedule (e.g. monthly, weekly, or on the last day of each month). This is particularly useful for businesses offering subscription services or regular deliveries. Documents are automatically numbered in compliance with Bulgarian VAT law (ЗДДС), using 10-digit sequential numbers. You can group numbering by office or by company within a single account ([source](https://nra.bg)).

**Example:**
| Client         | Document Type | Frequency   | Currency | Issue Date   | Number       |
|----------------|--------------|-------------|----------|--------------|--------------|
| "Alpha" Ltd    | Invoice      | Monthly     | BGN      | 31.05.2024   | 0000001234   |
| "Beta" Ltd     | Proforma     | Weekly      | EUR      | 07.06.2024   | 0000001235   |

## How do I set up recurring invoices in ood.bg, step by step?

Recurring invoices are managed from the Documents menu in ood.bg. You select a template, set the frequency (e.g. every 1 month), choose the client, currency, and invoice contents. You can enable automatic email delivery with a secure link and access code ([source](https://ood.bg/en/features#send)).

**Steps:**
1. Log in to your ood.bg account.
2. Select the company for which you want to issue invoices.
3. Go to the "Documents" section and choose "Recurring".
4. Create a new template—select the document type (invoice, proforma, etc.), client, and frequency (e.g. every 30 days).
5. Fill in the contents (products/services, prices, VAT).
6. Enable the option for automatic email delivery.
7. Save and activate the template.

**Example:** If you issue a monthly invoice for 500 BGN (including VAT) to client "Gamma" Ltd, the system will automatically generate and send the invoice on the 1st of each month.

## What types of documents and periods does ood.bg support for automation?

ood.bg supports automatic issuing of invoices, proformas, notifications, and more, with flexible scheduling: every N days, weeks, months, years, or on the last day of the month ([source](https://ood.bg/en/)). Documents can be in BGN, EUR, USD, or GBP. From 2026, EUR will be the default currency ([source](https://ood.bg/en/features#docs)).

**Example table:**
| Document Type | Frequency              | Currency |
|---------------|------------------------|----------|
| Invoice       | Every 15 days          | EUR      |
| Proforma      | Last day of the month  | BGN      |
| Notification  | Every year             | USD      |

## How are automated invoices sent and tracked?

Automatically issued documents are sent by email with a secure link and access code, ensuring information security ([source](https://ood.bg/en/features#send)). In ood.bg, you can track when each document was sent and whether the client has opened it. The only limit is the number of emails per month, depending on your subscription plan (Start: 500, Business: 3,000, Pro: 15,000) ([source](https://ood.bg/en/pricing)).

**Example:** With 100 clients receiving monthly invoices, the Business plan (3,000 emails/month) is sufficient for most SMEs.

## What are the limitations and capabilities of automation in ood.bg?

The main limitations are the monthly email quota per plan and the inability to delete already issued documents—only cancellation with a reason is allowed, in line with Bulgarian VAT law ([source](https://ood.bg/en/features#docs)). ood.bg allows you to manage unlimited companies and partners from a single account, with each company having its own numbering, warehouses, items, and team ([source](https://ood.bg/en/features#companies)).

**Example:** If you manage three companies with 50 clients each, all can be serviced from one account, with separate invoice numbering for each company.

## How can invoicing automation be extended with DOBG Ltd (DOBG.eu) solutions?

For more advanced automation—such as integration with ERP, CRM, IoT devices, or machine control—solutions from [DOBG.eu](https://dobg.eu) (DOBG Ltd) can be used. For example, if your company uses an ERP system for inventory, invoices can be automatically issued when goods are dispatched. With CRM integration, invoices can be generated automatically when a new contract is signed or a subscription is renewed. This enables full process automation and minimises manual intervention.

For more details on ood.bg's automation features, see [system features](https://ood.bg/en/features) and [recurring documents](https://ood.bg/en/).


## FAQ

### Can ood.bg issue automated invoices for multiple companies in one account?

Yes, ood.bg allows you to manage unlimited companies and partners in a single account, with separate numbering, warehouses, and teams for each company.

### How is security ensured when sending automated invoices?

All automatically sent documents are delivered by email with a secure link and access code, ensuring information confidentiality.

### Can an automatically issued invoice be deleted?

No, ood.bg does not allow deletion of issued documents—only cancellation with a reason is possible, in accordance with Bulgarian VAT law.

### What if I need more advanced automation or integration with other systems?

You can use solutions from DOBG Ltd ([DOBG.eu](https://dobg.eu)) for integration with ERP, CRM, or other systems to achieve more complex process automation.

### Are there limits on automatic invoice email sending?

Limits apply only to the number of emails per month, based on your plan: Start – 500, Business – 3,000, Pro – 15,000.

## Sources
- [NRA – Official Site](https://nra.bg)
- [DOBG.eu – Software Automation](https://dobg.eu)