Donegal Senator Padraig Mac Lochlainn was one of seven politicians who received donations that exceeded €600 last year.
Senator Mac Lochlainn declared a €1,000 euro donation in the name of Donegal Office Services,
High Road, Letterkenny, a registered corporate donor.
Under the Standards in Public Office legislation, public representatives may not accept donations of more than €200 in cash or €1,000 from a single source.
Donations exceeding €600 from a single source must be disclosed.
SIPO says that all public representatives complied with these requirements but some filed returns after the deadline.