Several thousand present and former postal employes in the Washington area will be getting lump sum payments this fall of up to $1,000 each.

Nationwide, more than 83,000 postal aides are due a portion of the settlement from U.S. Postal Service. It could run in excess of $65 million. That represents a lot of 13 cent stamps.

The payoffs, which will probably be made sometime after September of this year, result from a USPS agreement to reimburse employees for improperly compensated overtime worked between May 1, 1974, and the present. Union officials say the average payoff will be around $650 for an employe due the extra overtime who worked full-time from 1974 until now.

Payments for clerks, mail handlers and other "inside" employes result mainly from the failure to unclude premium pay as the basis for full overtime payment. Most of them did get overtime pay fo work performed, but were not reimbursed based on premium rates for shift and Sunday work.

The lump sum payments for letter carriers will be made mainly for overtime work which was done, but not specifically approved, by postal managers.

The National Association of Letter Carriers, American Postal Workers Union and Mailhandlers Union pushed the overtime pay claims based on alleged vilation of the Fair Labor Standards Act. The USPS has agreed to pay the claims at "compensatory and liquidation damages" for violations of the law as found by US. District Court Judge June L. Dreen here.

To be elligible for the giant payoff, Employes must have been on the payroll during the period (May 1, 1974, to present), have worked the overtime and have filled "consent forms" that permitted them to be included in the lawsuit.