Hi Lina,
If your settings are as below :
Dunning Interval in Days :7
No.of dunning levels :3
Days in arrears : 1 30 44
Min.days in arrears (acct) & grace period are nil
And for an invoice,
Baseline date : 01.10.2013
Payment term : Immediate
Then if you run dunning on 02.10.2013, the 1st level dunning notice will be issued. Your 2nd dunning run
will be on 09.10.2013 but it will not fetch any data from this invoice since the next criteria is 30 days. So after 4 dunning runs this data will be considered when the arrear days will exceed 30 days. The same process will be followed for the next level of dunning also.
Dunning intervals means you suppose to run the dunning at that interval i.e. 7 days in your case.
Hope it clarifies your doubt.
Thanks & Regards
Ramesh