Perhaps it might help if you state the airline or route etc as there may be something specific that relates to an airline or airport etc?

There was a similar thread on a British Airways post about ADOC:
https://www.flyertalk.com/forum/brit...c-meaning.html

Documents OK seems to be the meaning

Routing (same booking)

LIM-PTY (CM436) > at this stage, it was not possible for the agent to issue the last BP at the check-in counter (but she was able to issue the all others, all 3 with the CopaAirlines logo)
PTY-PUJ (CM241)
PUJ-YUL (AC1297) > two BP issued for this trip (the first one in LIM, with the CopaAirlines logo at the check-in counter, the second one in PUJ with the AirCanada logo at the GATE counter, remark: SIXF only on that second one)
YUL-GVA (AC884) (remark: ADOC SIXF on this one) (this BP was issued in PUJ, at the GATE counter. I was able to select my seat online for all flights, but it was impossible to check-in online for this flight, so I was not checked until the GATE agent at PUJ did this for me)

ADOC and ADOK mean the same thing, just different airlines/res systems use different codes. I think for AC it's a confirmation of COVID19 requirements. ie: Vaccine/Test results.

SIXF is a new code for Air Canada meaning sixth freedom. ie: you're travelling between two countries via Canada.

How about ADOC, SIXF, and ATTS?

https://i.postimg.cc/VYWhWjqK/IMG-0772.jpg

This is the most codes I've seen on one boarding pass.

Thanks ChrisA330!

Do you have also an idea why it wasn't possible for the agent at the check-in counter in LIM to check me in and issue the last boarding pass? Alternatively, it was not possible for me as well to do it online (the error message: "Partially checked-in. We was unable to check you in to all of your flights. Please see an agent at the airport for assistance"

Online the gate agent in PUJ was able to do it (and this agent have not asked me for any documents)

It's strange because in 2019, I made BCN-YUL-BOS then BOS-ZRH-BCN, and I got all my boarding pass on the first entry point (BCN then BOS)

My kids BPs for tomorrow have ATTS and YPTU under remarks. Any ideas what these mean?
I see someone else previously asked about ATTS, but no reply.

ATTS is the attestation for flights to the US. I believe YPTU is related to them being minors, but someone else more knowledgeable on this can verify.

bawm

(Y)oun (P)assenger (T)raveling (U)naccompanied

Many people in the thread thought there should be a Wiki for this thread. Well by popular demand I combed the last bit of the thread and collected what seemed to be some common ones. I'll keep combing but of course hopefully others can add or correct my mistakes.

ITD OSS? International to Domestic and One Stop Security.

International to Domestic

Remembered it after I posted :(

SIXF is a sixth freedom flight (e.g. SFO-YYC-FRA), and would be accompanied by ITI OSS in that case. I suspect ITI and ITD can show up without OSS, depending on where you're coming from.

Looked at my web-based BP; under "Airline Use", it's # YYZ then "ACSSCW".

Does anyone know what "ACSSCW" means?