Odoo tries to automatically match bank statement lines with Customer Invoices once a day:

You can change the frequency of this Automation (find it in Developer Mode) or run it manually.

Odoo looks for the PAYMENT REFERENCE in any part of the Bank Statement Line LABEL:

So this Bank Statement Line will match (assuming the amount is also the same) based on the Payment Reference being found in the Label field:

If you don't define a Payment Reference for an Invoice, it will use the Invoice Number.

Many Payment Providers deposit a "batch" in your bank, so you would need to download a file from their Portal telling you which Payments (and therefore Invoices) were included in the Batch. You can then create a Batch Payment in Odoo from that list and match the entire list for each deposit with the single bank statement line representing the deposit (and charge off the difference to fees).

They key is asking your Customer to use the Payment Reference in the MEMO field of the bank transfer they make to you, since that is what the Bank will use in the Label (along with other information).

In Odoo, it is possible to automatically reconcile invoices with bank statements when clients pay through the client portal. This involves configuring automated bank reconciliation settings and ensuring proper payment acquirer setup. For more detailed information, you can refer to the [Odoo documentation : https://www.odoo.com/documentation/17.0/applications/finance/accounting/bank/reconciliation.html]