This is an error generated in Loblaw's system regarding an invalid Department number sent on an invoice. This error message occurs when the two-digit number that you have entered in the "LCL Department Number" field in the Header of an invoice does not match the department number that Loblaw has entered for you on their end. You can verify that you are sending the correct department number by consulting the department number list available in the Partner Information section in your SPS Commerce Portal. If you think you are sending the correct department number according to that list, you may want to contact Loblaw to see if they are using a different department number. You can obtain a department number by emailing firstname.lastname@example.org
Please remember that when you re-send your invoice to Loblaw, you should never use the exact same invoice number, even if the first version of that invoice was rejected. We usually recommend putting a small letter a at the end of your invoice number to avoid confusion for you and so that Loblaw's system can accept it.