When you enter Bills, if you enter the same bill number 2x for the same vendor you’ll be warned.  Do your bills have numbers?  If not you could use the Bill’s date for the bill number or some other unique value.

Resolution for 'bill number 2x issue: 'how do I avoid paying the same invoice twice? Is there a way for QB’s to warn me the invoice number has already been paid?' available: Yes.

The bill number 2x issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bill number 2x issue yourself by looking for a resolution described in the article. If it is a complex bill number 2x issue or you are unable to solve the issue, you may contact us by clicking here or by using other bill number 2x support options.

For more information about resolving issues related to bill number 2x in Quickbooks/QBO or to get support for the issue 'how do I avoid paying the same invoice twice? Is there a way for QB’s to warn me the invoice number has already been paid?', click the link below: