DutchCanadian said:
Thanks. I was hoping to avoid booking a return flight until things were sorted out with where he'd be flying out from, but perhaps that will be the best bet. Any other tips on what he should bring with him to help demonstrate to border security he will leave on time?
My suggestion is doing the following as I just went through the same thing last month (Outland Sponsorship in progress, wife from Holland, she has visited numerous times):
1) A letter of invitation from the sponsor citing the reason the applicant is coming to Canada, the length of stay, the applicants financial situation (ensure to get the point across that the applicant will NOT be working at ANY time in Canada), where you are staying, who you are staying with (if others), sponsor's employer, salary, address, phone, etc... have sponsor sign and write they will be at the airport waiting if there are any issues and the Border Agent would like to confirm any info.
2) AOR receipt from Mississauga with UCI number- to show your are in the immigration process.
3) RETURN TICKET!!! This is a must!! Even if you book a return flight and end up canceling, changing airport, changing date etc....Border services wants to know you have a plan to leave (and wont overstay your 6 months max as visitor)....
4) My wife also had our marriage certificate but that is because we didnt want any problems.
Do this and you should be good but no guarantees obviously. My wife still had to explain our situation for 20 minutes at the Point of Entry (Vancouver airport)...mainly because her return ticket is 5 months 28 days after her arrival ;-) but also because this is the 4th visit to Canada in 2 years (second after marriage).
Good luck!!