In Quickbooks online, is there a way to send a check from Quickbooks to pay a vendor or reimburse someone who paid for an expense?

You can sign up for QB Billpay to pay vendor bills or reimburse anyone, including yourself, for your expenses. However, I recommend Melio as a better option, as you can earn cashbacks.

https://quickbooks.intuit.com/learn-support/global/manage-suppliers-and-expenses/pay-bills-online/01/1351046

At the moment, there's no direct way of sending a check to a vendor. However, you can use the Check feature and print the check to manually send it to your vendor, MIchelle215.

To enter one, follow the steps outlined below:
 

1. Go to the + Create icon.
2. Choose Check.
3. In the Payee dropdown, select who you want to address the check to.
4. From the Bank Account dropdown, select the account you want the money to come from.
5. Fill out the remaining fields accordingly.
6. (Optional) You can skip this step if you only want to record a check. But if you plan to print the check, you can choose to print it now or later.
   Note: If you need to reuse a check number, uncheck the Print later checkbox. When you save the check, confirm that you’re aware the check number already exists.
   • Print now - Select Print check. If you choose this option, QuickBooks will save the check and redirect you to the Print Checks page.
   • Print later - Select the Print later checkbox. This option adds the check to the print queue where you can enter the check number and print all your checks at once.
7. Click Save and close.
   
   

The process of reimbursing someone depends on who pays and receives the payment. If the payment was from a customer, you can create a customer refund. But if you paid a vendor, you can enter a vendor refund for the purchases made. 

If it's an employee who paid for the expense, you can reimburse them. 

Additionally, you can utilize QuickBooks Bill Pay where you can create online and even schedule bill payments. For more information, check this article for your reference: Pay bills with QuickBooks Bill Pay.

You may want to streamline or automate your transactions and payments, feel free to connect with our QuickBooks Live Expert Assisted team. They can help you save time and simplify the process.

If you have any additional questions and concerns when sending checks to your vendors, let me know so we can help. The Community team is always here to further assist you.