This transaction BOTTRF is used to replace the collecting bank of the contract.
Further information about transferring/replacing a party can be found in “Transferring a Party”.

These transactions are used to change the party including the necessary rebooking of liability, if applicable. In doing so, the liability is booked out of the account of the previous party and booked in to the account of the new party.

Temporary settlements will also be transferred to the new party after selecting the new party.
The disposition code is marked with an 'A' (advised in temporary settlement).

A message will be created for the new party as well as for the old party. The message advises the transfer of the party and the settlement of fees, if applicable.