13D Filing: Sundara Investment Partners, Llc and Jetpay Corp (NASDAQ:JTPY)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 13D

(Amendment No. 1)

Information To Be Included in Statements Filed Pursuant to § 240.13d-1(a) and

Amendments Thereto Filed Pursuant to § 240.13d-2(a)

JetPay Corporation

(Name of Issuer)

Common
Stock

(Title of Class of Securities)

913384103

(CUSIP Number)

Eric Tajcher

Jeffrey A. Letalien

Morgan, Lewis & Bockius LLP

101 Park Avenue

New
York, NY 10178

(212) 309-6000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 22, 2017

(Date of Event Which Requires Filing of This Statement)

If the filing
person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because off §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box.  ☐

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for
other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting persons initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page
shall not be deemed to be filed for the purpose of Section 18 of the Securities Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions
of the Act (however, see the Notes).