I've been working on documenting all of the possible notices in the letter table, in terms of letter_code, available markup, and which tables we can pull data from. this is collected here: https://wiki.koha-community.org/wiki/Customising_Notices_and_Slips#Notice_Sp... I updated the wiki page this morning, everything is up-to-date with master... but there's one thing I don't understand: SendAlerts. It looks like the letter code is passed in via cgi param, and I don't know what letter_codes are available for the calls in C4/Serials.pm, acqui/ lateorders.pl and serials/claims.pl Searching for enlightenment, --Barton