Hi MarieA ,

Thanks for reaching out with your query. Yes, Sage 50 provides a feature to prevent posting transactions to a closed period. Here's how you can block access to dates after the month-end:

1. On the main page of Sage 50, navigate to Setup.
2. Go to Settings, then Company, and select System.
3. Check the option "Do not allow transactions dated before."
4. Enter the end date of the month you have just closed or any other date past which you want to block transactions.
5. Click OK to confirm the change.

With this setting, users won’t be able to post or modify transactions dated before the specified date. This should safeguard the integrity of your closed periods.

For a step-by-step guide, you can refer to the knowledgebase article: How to prevent transactions on a specific date.

If this helps, please mark it as verified :)

Warm Regards,
Erzsi