The «Sales Documents Numeration» module for Magento 2 allows you to use a custom numeration for the sales documents: orders, invoices, shipments, and credit memos.
The module is free and open source.

Demo video: https://www.youtube.com/watch?v=alcoJyoby1M

Screenshots

1. Custom order number

2. Custom invoice number

3. Custom shipment number

4. Custom credit memo number

5. Extension settings

How to install

Hire me in Upwork, and I will:

• install and configure the module properly on your website
• answer your questions
• solve compatiblity problems with third-party checkout, shipping, marketing modules
• implement new features you need

2. Self-installation

bin/magento maintenance:enable
rm -f composer.lock
composer clear-cache
composer require mage2pro/sales-sequence:*
bin/magento setup:upgrade
bin/magento cache:enable
rm -rf var/di var/generation generated/code
bin/magento setup:di:compile
rm -rf pub/static/*
bin/magento setup:static-content:deploy -f en_US <additional locales>
bin/magento maintenance:disable

How to update

bin/magento maintenance:enable
composer remove mage2pro/sales-sequence
rm -f composer.lock
composer clear-cache
composer require mage2pro/sales-sequence:*
bin/magento setup:upgrade
bin/magento cache:enable
rm -rf var/di var/generation generated/code
bin/magento setup:di:compile
rm -rf pub/static/*
bin/magento setup:static-content:deploy -f en_US <additional locales>
bin/magento maintenance:disable