“your application is invalid and we are returning your documents”
“Making a valid application, that is, one on the correct form which complies with the above requirements does not guarantee the application will be successful. The application will be considered on its own merits and where appropriate, in accordance with the Immigration Rules and published policies.”
“32. [...] in the future: (i) The fee is processed immediately on receipt of the application and before an acknowledgment letter has been sent. (ii) The standard letter is amended so that it constitutes an acknowledgement that a valid application has been made. (iii) In cases of a failure to collect the fee in an application made in time, there is prompt communication with the applicant to afford an opportunity to check or correct the billing data. [...] 33. The absence of such measures, or cogent reasons why they cannot be adopted, may well result in a determination that the consideration of the application has been unfair and therefore not in accordance with the law...”