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The Once-On­ly Prin­ci­ple Project

The Once-On­ly Prin­ci­ple Project (TOOP) was launched by the Eu­ro­pean Com­mis­sion in Jan­uary 2017 as an ini­tia­tive of about 51 or­ga­ni­za­tions from 21 EU Mem­ber States and As­so­ci­at­ed Coun­tries.

The main ob­jec­tive of TOOP is to ex­plore and demon­strate the once-on­ly prin­ci­ple (OOP) across bor­ders, fo­cus­ing on da­ta from busi­ness­es. Do­ing this, TOOP wants to en­able bet­ter ex­change of busi­ness re­lat­ed da­ta or doc­u­ments with and be­tween pub­lic ad­min­is­tra­tions and re­duce ad­min­is­tra­tive bur­den for both busi­ness­es and pub­lic ad­min­is­tra­tions.

Projektlogo TOOP (The Once-Only Principle Project)


The once-on­ly prin­ci­ple needs to be seen in the con­text of pub­lic sec­tor dig­i­tal­i­sa­tion. It means that cit­i­zens and busi­ness­es pro­vide di­verse da­ta on­ly once in con­tact with pub­lic ad­min­is­tra­tions, while pub­lic ad­min­is­tra­tion bod­ies take ac­tions to in­ter­nal­ly share and reuse these da­ta – even across bor­ders – al­ways in re­spect of da­ta pro­tec­tion reg­u­la­tions and oth­er con­straints.

The con­cept of the OOP fo­cus­es on re­duc­ing ad­min­is­tra­tive bur­den for in­di­vid­u­als and busi­ness­es by re-or­ga­niz­ing pub­lic sec­tor in­ter­nal pro­cess­es, in­stead of mak­ing cit­i­zens and busi­ness users ad­just to ex­ist­ing pro­ce­dures.


TOOP im­ple­ments mul­ti­ple sus­tain­able pi­lots by us­ing a fed­er­at­ed IT ar­chi­tec­ture on a cross-bor­der, pan-Eu­ro­pean scale. Its aim is to con­nect reg­istries and e-Gov­ern­ment ar­chi­tec­tures in 21 coun­tries across Eu­rope. The so­lu­tions will be based on al­ready ex­ist­ing sys­tems in Mem­ber States and As­so­ci­at­ed Coun­tries.


Busi­ness­es will ben­e­fit from the so­lu­tions de­vel­oped by TOOP as they will be able to ful­fill le­gal obli­ga­tions by re­duced ad­min­is­tra­tive bur­den, time- and cost -sav­ings. At the same time, the da­ta that have been pro­vid­ed to pub­lic ad­min­is­tra­tions will al­ways re­main un­der full con­trol and con­sent of the busi­ness­es in­volved, in line with EU da­ta pro­tec­tion leg­is­la­tion.

Ad­min­is­tra­tions will achieve time and cost sav­ings through ad­min­is­tra­tive ef­fi­cien­cy and will be able to of­fer im­proved ser­vice qual­i­ty to busi­ness­es. Thus, ad­min­is­tra­tions will prof­it from a bet­ter-func­tion­ing dig­i­tal sin­gle mar­ket with in­creased cus­tomer sat­is­fac­tion and a bet­ter im­age of pub­lic au­thor­i­ties.

For more in­for­ma­tion about the project, vis­it the of­fi­cial web­site of www.toop.eu

your contact

Ms Anett Schlieb­n­er

+49 (0) 22899 358 3622