Emoney Reputation

Reputation of users of electronic money


Reputation sheet

Accumulating reputation



The best electronic money transfer systems (EMTSs) have no reversibility for spends. This means that once money are transferred from an account to another, it's not possible to reverse the transaction. These systems are great (particularly for merchants) because they put the burden of "policing" on individuals instead of merchants (as is the case with credit / debit cards).

However, this means that people must decide which merchants are honest, so that he can buy something from them. But, being online, is very difficult to know who is honest and there is little possible action one can take when he is the victim of an online fraud.

Thus, an EMTS must implement a rating system for its users. This must be optional, as probably only merchants would need it in order to look honest to customers.

The most important thing to do is for the EMTS to verify merchants. Basically, the EMTS would mark a certain account as verified, if the owner of the account provides to the EMTS certain identification documents. This verification could be entirely online, or physical. Then, the verification status is shown to all users.

Reputation sheet

Each account must have a reputation sheet. Any user should be able to see the reputation sheet of any account.

The reputation sheet of an account has to contain:

  • Verified account status: none, online, physical.

  • The time, in years, elapsed from the moment when the account was created. This is called "account age".

  • The time, in years, elapsed from the moment when the account was verified (at least) online.

  • Adult status (minor or adult) of the account holder.

  • Reputation.

Accumulating reputation

An account can automatically accumulate reputation points. The system is designed to allow the accumulation of points from accounts which are not verified. Unfortunately, this method is detrimental for small merchants because they need to be paid from many accounts in order to accumulate the maximum reputation.

For each time when the rated account receives a spend of at least 1 GAU from an account, the reputation of the rated account grows.

In order to receive reputation, the rated account must not have made, in the past year, a spend to or received a spend from the account which is paying now. Otherwise, a scammer could simply move some money between two accounts he owns in order to accumulate reputation.

New_R = min(KMR, R + KMR / KRAS)


  • "KMR": maximum reputation; constant. Recommended value: 100.

  • "KRAS": number of accounts which generate maximum reputation; constant. Recommended value: 100'000.

  • "R": reputation of the rated account. This is between 0 and KMR.

The reputation points are not added immediately when the spend is made. Each addition is put in a queue of reputation commands and is executed 30 days later, unless it is deleted by the spender.

A user can delete, from the queue, each addition of reputation points for the spends he makes to other accounts, in maximum 30 days after each spend is made.


There is one thing a scammer could do to artificially increase the reputation of one of his accounts. He could, one day, open KRAS temporary accounts Ti, wait one year so can start giving reputation from all of them. He needs 2 more accounts, X (his main account) and Y.

Then, he would fund account Y with 1 GAU, then transfer the money from account Y to account T1, and then from account T1 to account X, and then from account X to account Y. This means that for each time X gains reputation, there are 3 spends involved (and this means 3 spend fees). Repeating the operations, he would achieve maximum reputation for account X (received from accounts Ti).

To counteract this problem it is necessary to increase the KRAS so that the scammer would need more and more accounts (at least one year old) to do this. Another way would be to increase the minimum spending value (from 1 GAU) for which reputation is given, so that the fee paid would also increase.

If the fee for a spend is KSF GAU, the scammer would need to waste about 3 * KRAS * KSF GAU to reach maximum reputation for account X.

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