She is on Visitor Visa which is expiring on Jan 4, 2019.
But someone above says:
Yep! It does work! Use IRCC's Web Form to say that you forgot attach the receiptc and do attach the receipt when you submit your query. It'll take some days, but IRCC will send you an e-mail, saying that your document was successfully received by the visa officer.
I am thinking to try the Web Form.
When you say "They will likely return the OWP app", do you mean that they will process my wife pr application but only OWP application will be returned due to insufficient reasons