Originally Posted by
Eastbay1K
When another airline issues my BP, I always check with the connecting carrier to see if everything is ok with the BP, and it is always reissued.
NOTE that although I don't know particularly what happened with the "Also" above, but if AS has to reissue a ticket with partners, sometimes the reissued ticket numbers don't make it to the other carrier. Always be armed with your final ticket #s on your person.
This is great advice. Also, if you do get to the airport and find out that your ticket info hasn't been sent to the other carrier, you can politely ask an AS or QX agent to convert your flights on the other airline(s) to a paper ticket.