Beyonce's Dad -- I'm NOT A Deadbeat Dad!

Beyonce's father is hitting back against accusations he's a deadbeat dad ... he claims he paid what he owes in child support ... it's just a paperwork screw up.

TMZ broke the story ... Mathew Knowles' baby mama Alexsandra Wright says he's behind on 2 months ... to the tune of $24K.

According to sources familiar with the situation, a few of the payments were only slightly late, but past the deadline for being credited, so it appeared Mathew didn't fork over what he owed.
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Here's the problem... Mathew is now behind for December -- payment was due on the 1st. We're told he plans to pay up before it officially becomes delinquent.

Think of it as paying your rent, only with a kid.

We've reached out to Wright but haven't heard back.