If your client has multiple companies, you have two choices:
1) If your client needs to push documents to an accounting platform and they have multiple accounts on the accounting platform, then your client needs to have multiple Hubdoc accounts to do this.
You can only push documents to a single accounting software account from each Hubdoc account. You can however simultaneously connect to multiple accounting platforms with one Hubdoc account. (ex. Hubdoc connects to one QBO + one Xero account = acceptable)
2) If your client only needs to push documents to one account on an accounting platform, then your client only needs one Hubdoc account.
Ex. Multiple Hubdoc accounts to one QBO/Xero account.
Each Hubdoc account will need to have a unique email associated with the account. You can create an email alias as a convenient workaround. Click here to find out more about unique email addresses.