I applied for a Canadian PR and I sent a supposed complete package to IRCC however while I was cleaning up my document folder I learned that I missed to send 1 form. It was purely negligence on my end, I know. I tried to contact IRCC customer service as soon as possible however they are unable to help me or give me any possible resolution. What I did is that I sent another package to IRCC containing the document and sent a webform. The reason why I don't want my document to be returned as incomplete because if that happens it will cause another 1-2 years delay on my application since the pathway I am applying for is time limited.