Originally Posted by
SK AAR
Gate agents are quite busy and reluctant to change FFP at the gate. In addition, a change will often be entered with error and no miles will post. Then you have the problem with retro credit of miles when your BP reads SEN but you are trying to collect miles at other FFP...
Sorry, but this strategy will often fail.
Originally Posted by
Rambuster
There is also a high risk that the miles will end up in the wrong program.
The aforementioned problem forced me to take an unnecessary FRA-DUS to cross the theshold to SEN-

because miles were credited to UA MP.
UA has for pax profiles two status variables. One is called FQTV, the other FQTS. FQTV decides where the miles are accrued, FQTS decides about your status in the system. It is totally dependent on the agent's skills and willingness. Often they even do not know about the two status fields in their mask (FQTWT-F???).
I do not know how LH handles the issue (probably a protestant "either-or") but it is at least worth to ask. The best place to do this would be in a lounge in a quiet moment.
Starting from scratch in another FFP definitely sucks (low priority during irrops, last meal choice etc.

).